Harmonics or high frequency fatigue is present in all racing engines and will usually destroy the valvetrain if not controlled. Properly designed valve springs will control the dominant harmonics, provide the needed stability, and reduce valvetrain component wear. Ferrea valve springs are developed from high strength alloys, including premium grade chrome silicon steel.
Ferrea valve springs are heat-treated and stress relieved, which dramatically increases the spring’s life. their valve springs provide the stability needed for high lift, high rpm racing engines, while minimizing the load loss for today’s aggressive valvetrain combinations.
Part# | Type/Material/ Application | O.D. | I.D. | Seat Press. | Open Press. | Rate Inch | Coil Bind | Max Net Lift |
---|---|---|---|---|---|---|---|---|
ACURA INTEGRA GSR 1.7L - DOHC VTEC 16 VALVE (B17A1) - 1992-1993 ACURA INTEGRA GSR 1.8L - DOHC VTEC 16 VALVE (B18C1-C3) - 1994-2000 | ||||||||
S10027 | Dual Spring - Hi Pressure | 22.8 mm | 17.15 mm | 100 lbs @ 34 mm | 220 lbs @ 24 mm | 305 lbs | 20 mm | 13.5 mm |
Special Alloy | 30.10 mm | 22.88 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 OR Ferrea Aluminum Magnesium Retainer # E10018 and Ferrea Spring Seat Locator # SL1000 (Discard OEM Spring Seat Locator) | ||||||||
S10064 | Dual Spring - Turbo | 22.88 mm | 17.15 mm | 95 lbs @34 mm | 215 lbs @24 mm | 305 lbs | 19 mm | 14 mm |
Special Alloy- | 30.10 mm | 22.88 mm | ||||||
Hi Pressure | ||||||||
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1000 (Discard OEM Spring Seat Locator) | ||||||||
S10070 | Dual Spring - | 22.85 mm | 17.5 mm | 80 lbs @33 mm | 190 lbs @23 mm | 279 lbs | 18 mm | 14 mm |
Special Alloy | 30.45 mm | 22.85 mm | ||||||
Endurance Spring | ||||||||
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1004 (Discard OEM Spring Seat Locator). Maximum Retainer Step: 3.6 mm | ||||||||
S10086 | Dual Spring | 22.85mm | 17.5mm | 110 lb @ 34mm | 260 lb @ 21mm | 292 lbs | 20 mm | 13 mm |
Special Alloy | 30.45mm | 22.85mm | ||||||
Endurance Application | ||||||||
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1044 (Discard OEM Spring Seat Locator) This Spring requires Ferrea Roller Rocket # RR1000 | ||||||||
S10104 | Dual Spring - Turbo - | 23.10 mm | 17.2mm | 80 lbs @34 mm | 195 lbs @24 mm | 292 lbs | 20 mm | 13.5 mm |
PAC enhanced Alloy | 30mm | 23.10mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 OR # E11000LW Ferrea Aluminum | ||||||||
Magnesium Retainer # E10018 and Ferrea Spring Seat Locator # SL1000 (Discard OEM Spring Seat Locator) | ||||||||
ACURA RSX 2.0L - DOHC VTEC 16 VALVE (K20) - 2001-2006 | ||||||||
S10099 | Dual Spring- | Special Alloy | 22.85 mm | 17.5 mm @40 mm | 80 lbs @30 mm | 190 lbs | 279 lbs | 24 mm |
Endurance Spring | 30.45 mm | 22.85 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11066 and Ferrea Spring Seat Locator # SL1052 | ||||||||
(Discard OEM Spring Seat Locator). | ||||||||
S10100 | Dual Spring-Chrome Silicon | 23.1 mm | 17.35 mm | 105 lbs @ 39 mm | 225 lbs @ 29 mm | 305 lbs | 22 mm | 15 mm |
Drag Racing | 31 mm | 23.1 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11066 and Ferrea Spring Seat Locator # SL1053 (Discard OEM Spring Seat Locator) | ||||||||
S10149 | Dual Spring - PAC Enhanced | 22.86 mm | 16.86 mm | 140 lbs @40 mm | 265 lbs @30 mm | 317 lbs | 20 mm | 18.4 mm |
High Lift Drag Racing | 30.38 mm | 22.86 mm | ||||||
This Spring requires either Ferrea Titanium Retainer #E11125 or Ferrea Tool Steel Retainer # E20054, and Ferrea Spring | ||||||||
Seat Locator # SL1136. (Discard OEM Factory Spring Seat Locator). | ||||||||
ACURA INTEGRA LS-GS 1.8L - DOHC 16 VALVE (B18A1-B1) - 1990-2000 HONDA CRV 2.0L - DOHC 16 VALVE (B20A-B20Z) - 1997-2000 | ||||||||
S10046 | Dual | 20.8 mm | 16.51 mm | 60 lbs @ 36.5 mm | 160 lbs @ 26.5 mm | 254 lbs | 20 mm | 14 mm |
Chrome Silicon | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11023. | ||||||||
Use (FOR EXHAUST APPLICATION ONLY) Ferrea Spring Seat Locator # SL1017 | ||||||||
FOR INTAKE APPLICATION use Factory supplied Seat Locator. | ||||||||
ALFA ROMEO GTA 156 V6 3.2L - DOHC 24 VALVE - 2002-2005 | ||||||||
S10125 | Double Spring- | Special Alloy | 20.8 mm | 16.51 mm @31.5 mm | 75 lbs @21.5 mm | 175 lbs | 254 lbs | 17 mm |
Endurance | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11099 and Ferrea Spring Seat Locator # SL1107. Discard OEM Factory supplied Spring Seat Locator. | ||||||||
AUDI 1.8T - DOHC 20 VALVE - 1996-2005 | ||||||||
S10055 | Single Spring - Turbo | 21.5 mm | 15.1 mm | 65 lbs @ 34.5 mm | 145 lbs @ 24.5 mm | 216 lbs | 22.5 mm | 11 mm |
Special Alloy | ||||||||
(Intake - 12 pieces) | ||||||||
This Spring requires Ferrea Titanium Retainer # E11031 and Ferrea Spring Seat Locator # SL1025 (Discard OEM Spring Seat Locator). | ||||||||
S10056 | Dual Spring - Turbo | 22.75 mm | 17.1 mm | 80 lbs @ 32.5 mm | 180 lbs @ 22.5 mm | 254 lbs | 20 mm | 12 mm |
Special Alloy | 29.5 mm | 22.75 mm | ||||||
(Exhaust - 8 pieces) | ||||||||
This Spring requires Ferrea Titanium Retainer # E11032 and Ferrea Spring Seat Locator #SL1026 (Discard OEM Spring Seat Locator). | ||||||||
AUDI 2.0T - FSI -DOHC 16 VALVE - 2006-2008 | ||||||||
S10121 | Single Spring | 23.5 mm | 15.8 mm | 90 lbs @ 39 mm | 200 lbs @ 29mm | 279 lbs | 27 mm | 11 mm |
Special Alloy | ||||||||
Turbo - Endurance | ||||||||
This Spring requires Ferrea Titanium Retainer # E11093 and Ferrea Spring Seat Locator # SL1103 (Discard OEM Factory supplied Spring Seat Locator) | ||||||||
NOTE: Max Net Lift is limited by the Factory installed height and rocker arm bottom clearance with Ferrea Titanium Retainer | ||||||||
AUDI 2.0T TFSI - DOHC 16 VALVE - 2009-2013 | ||||||||
S10157 | Single Spring - Turbo | 22.38 mm | 15.52 mm | 80 lbs @37 mm | 180 lbs @27mm | 254 lbs | 24.6 mm | 11 mm |
PAC Enhanced Alloy | ||||||||
This Spring requires either Ferrea Titanium Retainer # E11129, and Ferrea Spring Seat Locator # SL1142. (Discard OEM factory supplied Spring Seat Locator) | ||||||||
NOTE: Max Net Lift is limited due to the OEM factory valve seal install height. | ||||||||
AUDI 2.7T - DOHC 30 VALVE (APB) - 1998-2004 | ||||||||
S10055 | Single Spring - Turbo | 21.5 mm | 15.1 mm | 65 lbs @ 34.5 mm | 145 lbs @ 24.5 mm | 216 lbs | 22.5 mm | 11 mm |
Special Alloy | ||||||||
(Intake - 18 pieces) | ||||||||
This Spring requires Ferrea Titanium Retainer # E11031 and Ferrea Spring Seat Locator # SL1025 (Discard OEM Spring Seat Locator). | ||||||||
S10056 | Dual Spring - Turbo | 22.75 mm | 17.1 mm | 80 lbs @ 32.5 mm | 180 lbs @ 22.5 mm | 254 lbs | 20 mm | 12 mm |
Special Alloy | 29.5 mm | 22.75 mm | ||||||
(Exhaust - 12 pieces) | ||||||||
This Spring requires Ferrea Titanium Retainer # E11032 and Ferrea Spring Seat Locator # SL1026 (Discard OEM Spring Seat Locator). | ||||||||
AUDI RS6 4.2L - DOHC V8 40 VALVE (BCY) - 2002-2004 | ||||||||
S10055 | Single Spring - Turbo | 21.5 mm | 15.1 mm | 65 lbs @ 34.5 mm | 145 lbs @ 24.5 mm | 216 lbs | 22.5 mm | 11 mm |
Special Alloy | ||||||||
(Intake - 24 pieces) | ||||||||
This Spring requires Ferrea Titanium Retainer # E11031 and Ferrea Spring Seat Locator # SL1025 (Discard OEM Spring Seat Locator). | ||||||||
AUDI RS6 4.2L - DOHC V8 40 VALVE (BCY) - 2002-2004 | ||||||||
S10056 | Dual Spring - Turbo | 22.75 mm | 17.1 mm | 80 lbs @ 32.5 mm | 180 lbs @ 22.5 mm | 254 lbs | 20.5 mm | 12 mm |
Special Alloy | 29.5 mm | 22.75 mm | ||||||
(Exhaust - 16 pieces) | ||||||||
This Spring requires Ferrea Titanium Retainer # E11032 and Ferrea Spring Seat Locator # SL1026 (Discard OEM Spring Seat Locator). | ||||||||
AUDI 80 QUATRO 2.2 L - DOHC 20 VALVE (7A) - 1989-1992 AUDI 200 QUATRO 2.2 L - DOHC 20 VALVE (3B) - 1991 AUDI COUPE QUATRO 2.2 L - DOHC 20 VALVE (7A) - 1990-1991 | ||||||||
S10115> | Dual Spring | 22.75 mm | 17.1 mm | 85 lbs @ 33 mm | 205 lbs @ 23 mm | 304 lbs | 17.5 mm | 14 mm |
Special Alloy | 29.5 mm | 22.75 mm | ||||||
Endurance Application | ||||||||
This Spring requires Ferrea Titanium Retainer # E11084 and Ferrea Seat Locator # SL1073 (Discard OEM Spring Seat Locator). | ||||||||
AUDI RS2 2.2 L - DOHC 20 VALVE (ADU) - 1994-1995AUDI S4 2.2 L - DOHC 20 VALVE (AAN) - 1992-1994AUDI S6 2.2 L - DOHC 20 VALVE (AAN) - 1995 | ||||||||
S10115 | Dual Spring | 22.75 mm | 17.1 mm | 85 lbs @ 33 mm | 205 lbs @ 23 mm | 304 lbs | 17.5 mm | 14 mm |
Special Alloy | 29.5 mm | 22.75 mm | ||||||
Endurance Application | ||||||||
This Spring requires Ferrea Titanium Retainer # E11084 and Ferrea Seat Locator # SL1073 (Discard OEM Spring Seat Locator). | ||||||||
AUDI V8 3.6 L - DOHC 32 VALVE (PT) - 1990-1991 AUDI V8 4.2 L - DOHC 32 VALVE (ABH) - 1992-1994 | ||||||||
S10115 | Dual Spring | 22.75 mm | 17.1 mm | 85 lbs @ 33 mm | 205 lbs @ 23 mm | 304 lbs | 17.5 mm | 14 mm |
Special Alloy | 29.5 mm | 22.75 mm | ||||||
Endurance Application | ||||||||
This Spring requires Ferrea Titanium Retainer # E11084 and Ferrea Seat Locator # SL1073 (Discard OEM Spring Seat Locator). | ||||||||
BMW E36 3.2L - DOHC 24 VALVE (S42 / M42 / M50/ S50 / M52 / M54) - 1990-2000 | ||||||||
S10049 | Dual Spring - Turbo | 22.75 mm | 17.1 mm | 80 lbs @ 36 mm | 180 lbs @ 26 mm | 254 lbs | 21 mm | 14 mm |
Special Alloy | 29.5 mm | 22.75 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11025 or Ferrea Aluminum Magnesium Retainer # E10025and Ferrea Spring Seat Locator #SL1021 (Discard OEM Spring Seat Locator). | ||||||||
BMW E46 3.2L - DOHC 24 VALVE (S54) - 2001-2006 | ||||||||
S10156 | Dual Spring - Endurance | 20.8 mm | 16.51 mm | 85 lbs @41 mm | 185 lbs @31 mm | 254 lbs | 26.5 mm | 14.0 mm |
Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11128, and Ferrea Spring Seat Locator # SL1141. (Discard OEM Factory supplied Spring Seat Locator) | ||||||||
BMW E60/E82/E91/E92 3.0L - DOHC 24 VALVE (N54) - 2007-2010 | ||||||||
S10158 | Single Spring - Turbo | 22.38 mm | 15.52 mm | 70 lbs @36.5mm | 170 lbs @26.5mm | 254 lbs | 23.15 mm | 12.5 mm |
PAC Enhanced Alloy | ||||||||
This Spring requires 2 Ferrea Titanium Retainer (EXHAUST) # E11130, and (INTAKE) # E11131 and Factory supplied Spring Seat | ||||||||
DODGE NEON 2.4 - SRT4 - DOHC 16 VALVE (A853) - 2003-2005 | ||||||||
S10107 | Dual Spring - Turbo | 20.8 mm | 16.51 mm | 90 lbs @37 mm | 200 lbs @27 mm | 279 lbs | 23 mm | 12 mm |
Stage 1 - Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11073 and BOTH, Ferrea Spring Seat Locator # SL1061 and Factory supplied Spring Seat Locator. | ||||||||
S10108 | Dual Spring - Turbo | 20.8 mm | 15.88 mm | 105 lbs @37 mm | 235 lbs @27 mm | 330 lbs | 23.5 mm | 12 mm |
Stage 2 - Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11074 and BOTH, Ferrea Spring Seat Locator # SL1062 and Factory supplied Spring Seat Locator. | ||||||||
FORD 2.3L - DOHC ZETEC 16 VALVE - 2002 | ||||||||
S10040 | Single Spring | 24.70 mm | 18.23 mm | 60 lbs @ 31.5 mm | 140 lbs @ 21.5 mm | 203 lbs | 18.5 mm | 12.5 mm |
Special Alloy | ||||||||
This Spring requires Ferrea Titanium Retainer # E11018 and both, Ferrea Spring Seat Locator # SL1020 and Factory supplied Spring Seat Locator. | ||||||||
S10041 | Dual Spring - Turbo | 18.23 mm | 13.40 mm | 75 lbs @32.75mm | 195 lbs @22.75mm | 305 lbs | 18.75 mm | 13.5 mm |
Special Alloy | 24.70 mm | 18.23 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11018 and Ferrea Spring Seat Locator # SL1019 (Discard OEM Spring | ||||||||
Seat Locator) note: This Spring (# S10041) can be used only with Ferrea Aluminum Bronze Valve Guides (for 5.5 mm valve stem) # VG1015 (Intake) and # VG1016 (Exhaust) and Ferrea Valve Seals # VS10005 (Exhaust) and # VS1001 (Intake) | ||||||||
FORD ESCORT 2.0L - DOHC ZETEC 16 VALVE (ZX2) - 1999-2001 FORD FOCUS 2.0L - DOHC ZETEC 16 VALVE (ZX3) - 2000-2001 | ||||||||
S10040 | Single Spring | 24.70 mm | 18.23 mm | 60 lbs @ 31.5 mm | 140 lbs @ 21.5 mm | 203 lbs | 18.5 mm | 12.5 mm |
Special Alloy | ||||||||
This Spring requires Ferrea Titanium Retainer # E11018 and BOTH, Ferrea Spring Seat Locator # SL1014 and Factory supplied Spring Seat Locator. | ||||||||
S10041 | Dual Spring - Turbo | 18.23 mm | 13.40 mm | 75 lbs @ 32.75 mm | 195 lbs @ 22.75 mm | 305 lbs | 18.75 mm | 13.5 mm |
Special Alloy¬ | 24.70 mm | 18.23 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11018 and Ferrea Spring Seat Locator # SL1015 | ||||||||
(Discard OEM Spring Seat Locator) | ||||||||
NOTE: This Spring (# S10041) can be used only with Ferrea Manganese Bronze Valve Guides (for 5.5 mm valve stem) | ||||||||
# VG1006 (Intake) and # VG1007 (Exhaust) and Ferrea Valve Seals # VS1000 (Exhaust) and # VS1001 (intake). | ||||||||
GEO METRO/SUZUKI SWIFT 1.0 L - SOHC 6 VALVE (G10) - 1995-2001 | ||||||||
S10047 | Dual Spring - Turbo | 18.23 mm | 13.40 mm | 70 lbs @ 35.5 mm | 175 lbs @ 25.5 mm | 266 lbs | 18.75 mm | 14 mm |
Special Alloy | 24.70 mm | 18.23 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11024 and Ferrea Spring Seat Locator # ESL1018 (Discard OEM Spring Seat Locator) | ||||||||
GM 2.2 ECO TEC - 2000-2008 | ||||||||
S10057 | Dual Spring - Turbo | 20.8 mm | 16.51 mm | 75 lbs @ 32.5 mm | 175 lbs @ 22.5 mm | 254 lbs | 17.5 mm | 14 mm |
Special Alloy | 28 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11033 or Ferrea Aluminum Magnesium Retainer # E10026 and Factory supplied Spring Seat Locator | ||||||||
NOTE: For High Pressure use Both Ferrea Spring Seat Locator # SL1028 And Factory supplied Spring Seat Locator | ||||||||
High Pressure spec. | 110 lbs @ 31 mm | 210 lbs @ 21 mm | 12.5 mm | |||||
GM 5 CYLINDER - L5 - 2002-2006 | ||||||||
S10058 | Dual Spring - Turbo | 20.8 mm | 16.51 mm | 85 lbs @ 32 mm | 185 lbs @ 22 mm | 254 lbs | 17.5 mm | 13.5 mm |
Special Alloy | 28 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11034 or Ferrea Aluminum Magnesium Retainer # E10027 and both, Ferrea Spring Seat Locator # SL1027 and Factory supplied Spring Seat Locator. | ||||||||
HIGH PRESSURE SPRINGS (SPECIAL APPLICATIONS) | ||||||||
S10063 | Dual Spring | 22.6 mm | 16.55 mm | 150 lbs @35.6 mm | 450 lbs @19 mm | 462 lbs | 18 mm | 16.5 mm |
Special Alloy | 30.86 mm | 22.6 mm | ||||||
Maximum Retainer step 1.9 mm | ||||||||
HONDA ACCORD 2.2L - SOHC 16 VALVE (F22B2-F22B6) - 1994-1995 | ||||||||
S10064 | Dual Spring - Turbo | 22.88 mm | 17.15 mm | 95 lbs @34 mm | 215 lbs @24 mm | 305 lbs | 19 mm | 14 mm |
Special Alloy- Hi Pressure | 30.10 mm | 22.88 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1000 (Discard OEM Spring Seat Locator) | ||||||||
S10070 | Dual Spring - | 22.85 mm | 17.5 mm | 80 lbs @33 mm | 190 lbs @23 mm | 279 lbs | 18 mm | 14 mm |
Special Alloy Endurance Spring | 30.45 mm | 22.85 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1010 (Discard OEM Spring Seat Locator). Maximum Retainer Step: 3.6 mm | ||||||||
S10104 | Dual Spring - Turbo - | 23.10 mm | 17.2mm | 80 lbs @34 mm | 195 lbs @24 mm | 292 lbs | 20 mm | 13.5 mm |
PAC enhanced Alloy | 30mm | 23.10mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 OR # E11000LW OR Ferrea Aluminum | ||||||||
Magnesium Retainer # E10018 and Ferrea Spring Seat Locator # SL1010 (Discard OEM Spring Seat Locator) | ||||||||
HONDA CIVIC 1.6L - SOHC 16 VALVE (D16Z6-Y5-Y7-Y8) - 1992-2000 | ||||||||
S10029 | Single Spring | 22.9 mm | 15.35 mm | 60 lbs @ 50 mm | 155 lbs @ 40 mm | 241 lbs | 32 mm | 17 mm |
Special Alloy | ||||||||
This Spring requires Ferrea Titanium Retainer # E11010 OR Ferrea Aluminum Magnesium Retainer # E10019 and Factory supplied Spring Seat Locator (Use only this locator) | ||||||||
HONDA DEL SOL 1.6L - DOHC VTEC 16 VALVE (B16A1) - 1994-1997 HONDA CIVIC SI 1.6L - DOHC VTEC 16 VALVE (B16A3) - 1999-2000 | ||||||||
S10027 | Dual Spring - Hi Pressure | 22.8 mm | 17.15 mm | 100 lbs @ 34 mm | 220 lbs @ 24 mm | 305 lbs | 20 mm | 13.5 mm |
Special Alloy | 30.10 mm | 22.88 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 OR Ferrea Aluminum Magnesium Retainer E10018 and Ferrea Spring Seat Locator # SL1003 (Discard OEM Spring Seat Locator) | ||||||||
S10064 | Dual Spring - Turbo | 22.88 mm | 17.15 mm | 95 lbs @34 mm | 215 lbs @24 mm | 305 lbs | 19 mm | 14 mm |
Special Alloy- Hi Pressure | 30.10 mm | 22.88 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1000 (Discard OEM Spring Seat Locator) | ||||||||
HONDA DEL SOL 1.6L - DOHC VTEC 16 VALVE (B16A1) - 1994-1997 HONDA CIVIC SI 1.6L - DOHC VTEC 16 VALVE (B16A3) - 1999-2000 | ||||||||
S10070 | Dual Spring - | 22.85 mm | 17.5 mm | 80 lbs @33 mm | 190 lbs @23 mm | 279 lbs | 18 mm | 14 mm |
Special Alloy Endurance Spring | 30.45 mm | 22.85 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1004 (Discard OEM Spring Seat Locator). Maximum Retainer Step: 3.6 mm | ||||||||
S10086 | Dual Spring | 22.85mm | 17.5mm | 110 lb @ 34mm | 260 lb @ 21mm | 292 lbs | 20 mm | 13 mm |
Special Alloy Endurance Application | 30.45mm | 22.85mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1044 (Discard OEM Spring Seat Locator) This Spring requires Ferrea Roller Rocker System # RR1000 | ||||||||
S10104 | Dual Spring - Turbo - | 23.10 mm | 17.2mm | 80 lbs @34 mm | 195 lbs @24 mm | 292 lbs | 20 mm | 13.5 mm |
PAC enhanced Alloy | 30mm | 23.10mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 OR E11000LW OR Ferrea Aluminum | ||||||||
Magnesium Retainer # E10018 and Ferrea Spring Seat Locator # SL1000 (Discard OEM Spring Seat Locator) | ||||||||
HONDA PRELUDE 2.2L - DOHC VTEC 16 VALVE (H22A1-A4) - 1993-2000 | ||||||||
S10027 | Dual Spring - Hi Pressure | 22.88 mm | 17.15 mm | 100 lbs @ 34 mm | 220 lbs @ 24 mm | 305 lbs | 20 mm | 13.5 mm |
Special Alloy | 30.10 mm | 22.88 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 OR Ferrea Aluminum Magnesium Retainer E10018 and Ferrea Spring Seat Locator # SL1003 (Discard OEM Spring Seat Locator) | ||||||||
S10064 | Dual Spring - Turbo | 22.88 mm | 17.15 mm | 95 lbs @34 mm | 215 lbs @24 mm | 305 lbs | 19 mm | 14 mm |
Special Alloy- Hi Pressure | 30.10 mm | 22.88 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1000 (Discard OEM Spring Seat Locator) | ||||||||
S10070 | Dual Spring - | 22.85 mm | 17.5 mm | 80 lbs @33 mm | 190 lbs @23 mm | 279 lbs | 18 mm | 14 mm |
Special Alloy Endurance Spring | 30.45 mm | 22.85 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 and BOTH, Ferrea Spring Seat Locator # SL1003 AND Factory supplied Spring Seat Locator. | ||||||||
S10104 | Dual Spring - Turbo - | 23.10 mm | 17.2mm | 80 lbs @34 mm | 195 lbs @24 mm | 292 lbs | 20 mm | 13.5 mm |
PAC enhanced Alloy | 30mm | 23.10mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11000 OR # E11000LW OR Ferrea Aluminum | ||||||||
Magnesium Retainer # E10018 and Ferrea Spring Seat Locator # SL1003 (Discard OEM Spring Seat Locator) | ||||||||
HONDA S 2000 - F20C - 2000-2003 HONDA S 2000 - F22C - 2004-2008 | ||||||||
S10074 | Dual Spring - | 22.85 mm | 17.5 mm | 90 lbs @42 mm | 210 lbs @32 mm | 292 lbs | 28 mm | 13 mm |
Special Alloy Turbo - Endurance Spring | 30.45 mm | 22.85 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11045 and Ferrea Spring Seat Locator # SL1035 AND Factory supplied Spring Seat Locator. | ||||||||
HYUNDAI GENESIS 2.0L - DOHC 16 VALVE (TURBO BK) - 2008-2010 | ||||||||
S10118 | Dual Spring - Turbo | 20.8 mm | 16.51 mm | 75 lbs. @36 mm | 175 lbs @26 mm | 254 lbs | (*) | 12 mm |
Special Alloy | 28 mm | 20.8 mm | ||||||
This spring requires Ferrea Titanium Retainer # E11089 AND Ferrea Spring Seat Locator # SL1096 AND OEM Factory supplied Spring Seat Locator. | ||||||||
NOTE: (*) Max Net Lift is limited by the OEM Factory hat style seat/seal locator height, so Spring Coil Bind does not apply. | ||||||||
HYUNDAI GENESIS COUPE V-6 3.8L - DOHC 24 VALVE (LAMBDA) - 2010 | ||||||||
S10134 | Single Spring | 25.19 mm | 18.3 mm | 90 lbs @34.85 mm | 152 lbs @24.85 mm | 157 lbs | 21.6 mm | 12.5 mm |
Special Alloy Endurance Spring | ||||||||
This Spring requires Ferrea Titanium Retainer # E11105 and OEM Spring Seat Locator | ||||||||
HYUNDAI TIBURON 4 CYL - DOHC 16 VALVE - 1996-2001 | ||||||||
S10094 | Dual Spring - Turbo | 20.8 mm | 15.88 mm | 85 lbs @32mm | 200 lbs @22mm | 291 lbs | 17 mm | 19 mm |
Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11062 and Ferrea Spring Seat Locator # SL1050 (Discard OEM Spring Seat Locator) | ||||||||
HYUNDAI V-6 TIBURON - 2001-2008 | ||||||||
S10081 | Single Spring - | 25.19 mm | 18.3 mm | 80 lbs @34 mm | 150 lbs @24 mm | 180 lbs | 20.5 mm | 12.5 mm |
Special Alloy Turbo - Endurance Spring | ||||||||
This Spring requires Ferrea Titanium Retainer # E11049 and Ferrea Spring Seat Locator # SL1039 (Discard OEM Spring Seat Locator) | ||||||||
LAMBORGHINI V10 5.0L - DOHC 40 VALVE - 2003-2007 | ||||||||
S10145 | Single Spring | 23.5 mm | 15.8 mm | 90 lbs. @39.9 mm | 210 lbs @29 mm | 287 lbs | 28 mm | 11 mm |
Special Alloy Turbo - Endurance | ||||||||
This spring requires Ferrea Titanium Retainer # E11119 and Ferrea Spring Seat Locator # SL1127 | ||||||||
NOTE: Max Net Lift is limited by the OEM Factory install height and rocker arm bottom clearance with Ferrea titanium retainer. | ||||||||
LOTUS ELISE / EXIGE 1.8L - DOHC 16 VALVE (2ZZ-GE) - 2008 | ||||||||
S10123 | Dual Spring - Endurance | 19.05 mm | 13.95 mm | 75 lbs @ 38.5 mm | 180 lbs @ 28.5 mm | 274 lbs | 24 mm | 13.5 mm |
Special Alloy | 25.30 mm | 19.05 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11097 and Ferrea Spring Seat Locator # SL1105 (Discard OEM Spring Seat Locator) | ||||||||
MAZDA 626 V6 2.5 L - DOHC KL - 1993-1998 | ||||||||
S10138 | Dual Spring - Turbo | 19.05 mm | 13.95 mm | 75 lbs @ 33 mm | 195 lbs @ 23 mm | 305 lbs | 19 mm | 13.5 mm |
Special Alloy | 25.3 mm | 19.05 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11108 and Ferrea Spring Seat Locator # SL1022 (Discard OEM Spring Seat Locator) | ||||||||
MINI COOPER S - 16 VALVE - 2002-2006 | ||||||||
S10111 | Dual Spring - Turbo | 18.20 mm | 13.4 mm | 95 lbs @42.5mm | 210 lbs @32.5mm | 292 lbs | 30 mm | 10.5 mm |
Special Alloy | 24.70 mm | 18.20 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11080, Ferrea Spring Seat Locator # SL1067 AND Factory supplied Spring Seat Locator. | ||||||||
Part# | Type/Material/ Application | O.D. | I.D. | Seat Press. | Open Press. | Rate Inch | Coil Bind | Max Net Lift |
MITSUBISHI 3000 GT 3.0L - DOHC 24 VALVE (6G72-TURBO 6G72T) - 1990-2001 | ||||||||
S10037 | Dual Spring - Turbo - | 23.10 mm | 17.2mm | 80 lbs @34 mm | 195 lbs @24 mm | 292 lbs | 20 mm | 13.5 mm |
PAC enhanced Alloy | 30mm | 23.10mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11053 OR Ferrea Aluminum Magnesium Retainer # E10023 and Ferrea Spring Seat Locator # SL1008 (Discard OEM Spring Seat Locator) | ||||||||
MITSUBISHI ECLIPSE GS-GST 2.0L - DOHC 16 VALVE (4G63-4G63T) - 1990-1999 | ||||||||
S10031 | Dual | 23.1 mm | 17.35 mm | 90 lbs @ 38 mm | 210 lbs @ 28 mm | 305 lbs | 21 mm | 15 mm |
Chrome Silicon | 31 mm | 23.1 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11005 and Ferrea Spring Seat Locator # SL1002 (Discard OEM Spring Seat Locator) | ||||||||
S10036 | Dual Spring - Turbo | 22.75 mm | 17.1 mm | 80 lbs @ 34 mm | 180 lbs @ 24 mm | 254 lbs | 20 mm | 13.5 mm |
Special Alloy | 29.5 mm | 22.75 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11005 OR Ferrea Aluminum Magnesium Retainer # E10024 and Ferrea Spring Seat Locator # SL1009 (Discard OEM Spring Seat Locator) | ||||||||
MITSUBISHI EVOLUTION VIII 2.0L - DOHC 16 VALVE (TURBO 4G63T) - 2003-2007 | ||||||||
S10084 | Dual Spring - Turbo | 22.85 mm | 17.5 mm | 95 lbs @30.6 mm | 225 lbs @20.6 mm | 327 lbs | 18 mm | 12.5 mm |
Special Alloy | 30.45 mm | 22.85 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11052 and Ferrea Spring Seat Locator # SL1041. | ||||||||
MITSUBISHI EVOLUTION X 2.0L - DOHC 16 VALVE (4B11T) - 2007-2009 | ||||||||
S10118 | Dual Spring-Endurance | 20.8 mm | 16.51 mm | 75 lbs @36 mm | 175 lbs @26 mm | 254 lbs | (*) | 12 mm |
Special Alloy | 28 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11089 AND Ferrea Spring Seat Locator # SL1096 AND OEM Factory supplied Spring Seat Locator. | ||||||||
NOTE: (*)Max Net Lift is limited by the OEM Factory hat style seat/seal locator height, so Spring Coil Bind does not apply. | ||||||||
NISSAN 300 ZX 3.0L - DOHC 24 VALVE (VG30D-TURBO VG30DTT) - 1990-1996 | ||||||||
S10039 | Dual Spring | 20.8 mm | 15.3 mm | 80 lbs @ 35 mm | 200 lbs @ 25 mm | 305 lbs | 22 mm | 13 mm |
Chrome Silicon | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11017 and BOTH Ferrea Spring Seat Locator # SL1012 and Factory supplied Spring Seat Locator | ||||||||
NISSAN 350 Z 3.5 L - V-6 - DOHC 24 VALVE (VQ35) - 2003-2008 | ||||||||
S10091 | Single Spring | 25.19mm | 18.3mm | 75 lbs @34.8mm | 145 lbs @24.8mm | 178 lbs | 20.5 mm | 12.5 mm |
Special Alloy - Turbo Endurance Application | ||||||||
This Spring to be used with Factory Valves with recess tip and Ferrea Titanium Retainer # E11060 AND Factory supplied Spring Seat Locator | ||||||||
NISSAN 350 Z 3.5 L - V-6 - DOHC 24 VALVE (VQ35) - 2003-2008 | ||||||||
S10093 | Single Spring | 25.19mm | 18.3mm | 85 lbs @34mm | 155 lbs @24mm | 178 lbs | 20.5 mm | 12.5 mm |
Special Alloy - Turbo Endurance Application | ||||||||
This Spring to be used with Ferrea Lightweight Valves without recess tip and Ferrea Titanium Retainer # E11058 AND Ferrea Spring Seat Locator # SL1048 | ||||||||
S10103 | Dual Spring - | 20.8 mm | 15.88mm | 80 lbs @34mm | 200 lbs @24mm | 305 lbs | 19 mm | 13 mm |
Special Alloy - Turbo Street/Drag | 28.0 mm | 20.8 mm | ||||||
This Spring to be used with Ferrea lightweight Valves without recess tip. | ||||||||
This spring requires Ferrea Titanium Retainer # E11079 AND Ferrea Spring Seat Locator # SL1065. (Discard OEM Spring Seat Locator). | ||||||||
NISSAN ALTIMA 2.4L - DOHC 16 VALVE (KA24DE) - 1995-1999 NISSAN 240 SX 2.4L - DOHC 16 VALVE (KA24DE) - 1991-1998 | ||||||||
S10043 | Dual Spring - Turbo | 23.10 mm | 17.2 mm | 80 lbs @36 mm | 195 lbs @26 mm | 254 lbs | 22 mm | 12.5 mm |
PAC enhanced Alloy | 30 mm | 23.10 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11021 and BOTH Ferrea Spring Seat Locator # SL1064 and Factory supplied Spring Seat Locator | ||||||||
NISSAN GT-R 3.8 L V-6 - DOHC 24 VALVE (VR38DETT) - 2009-2010 | ||||||||
S10136 | Dual Spring - Turbo | 20.8 mm | 15.88 mm | |||||
Special Alloy | 28.0 mm | 20.8 mm | ||||||
INTAKE ASSEMBLY | 90 lbs @37.5 mm | 212 lbs @27.5 mm | 309.6 lbs | 23.5 mm | 13 mm | |||
EXHAUST ASSEMBLY | 90 lbs @34.35 mm | 212 lbs @24.35 mm | 309.6 lbs | 19.6 mm | 13.5 mm | |||
This Spring requires Ferrea Titanium Retainer # E11106 and Ferrea Spring Seat Locator # SL1118 (EXH Side) and Ferrea Spring Seat Locator # SL1115 (INT Side). (Discard OEM Spring Seat Locator) | ||||||||
S10137 | Single Spring Special Alloy | 25.19 mm | 18.3 mm | 90 lbs @ 35mm | 160 lbs @25mm | 177 lbs | 22.65 mm | 11 mm |
This Spring requires 2 Ferrea Titanium Retainer (EXHAUST) # E11110 and (INTAKE) # E11107 and Ferrea Spring Seat Locator # SL1116. Discard OEM Factory supplied Spring Seat Locator. | ||||||||
NISSAN PATROL 4.5L 6 CYL IN LINE - 12 VALVE - (TB45E) - 1997-2004 | ||||||||
S10128 | Dual Spring - Chr Silicon | 23.1 mm | 17.35 mm | 70 lbs @40.6mm | 195 lbs @30.6mm | 317 lbs | 20.5 mm | 14.15 mm |
Endurance | 31 mm | 23.1 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11102 and Ferrea Spring Seat Locator # SL1111 | ||||||||
Discard OEM Factory supplied Spring Seat Locator. | ||||||||
NISSAN PATROL 4.8L 6 CYL IN LINE - 24 VALVE - (TB48DE) - 2004-2010 | ||||||||
S10114 | Dual Spring - Turbo | 20.8 mm | 16.51 mm | 85 lbs @36.85mm | 190 lbs @26.85mm | 266 lbs | 22.85 mm | 12 mm |
Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11083 and Ferrea Spring Seat Locator # SL1070 | ||||||||
Discard OEM Factory supplied Spring Seat Locator. | ||||||||
S10133 | Single Spring | 28.0 mm | 20.8 mm | 73 lbs @35.85 mm | 155 lbs @25.85 mm | 208 lbs | 22.85 mm | 12 mm |
Special Alloy | ||||||||
This Spring requires Ferrea Titanium Retainer # E11109 and Ferrea Spring Seat Locator # SL1070 | ||||||||
Discard OEM Factory supplied Spring Seat Locator. | ||||||||
NISSAN SENTRA SE-R 2.0L - DOHC 16 VALVE (SR20DE-SR20DET) - 1991-1998 | ||||||||
S10038 | Dual Spring - Turbo | 23.10 mm | 17.2 mm | 80 lbs @ 34 mm | 195 lbs @ 24 mm | 254 lbs | 22 mm | 12.5 mm |
PAC enhanced Alloy | 30 mm | 23.10 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11002 and Ferrea Spring Seat Locator # SL1011 (Discard OEM Spring Seat Locator) | ||||||||
NISSAN SENTRA SE-R 2.5L - SPEC V - QR25 - 2002-2007 | ||||||||
S10083 | Single Spring - Turbo | 25.19 mm | 18.4 mm | 80 lbs @34 mm | 150 lbs @24 mm | 180 lbs | 20.5 mm | 12.5 mm |
Special Alloy | ||||||||
This Spring requires Ferrea Titanium Retainer # E11051 and Factory supplied Spring Seat Locator. | ||||||||
NISSAN SKYLINE 6 CYL IN LINE - 24 VALVE - (RB25DET) - 1993-1997 | ||||||||
S10112 | Dual Spring - Turbo | 20.8 mm | 16.51 mm | |||||
Special Alloy | 28.0 mm | 20.8 mm | ||||||
INTAKE ASSEMBLY | 110 lbs @ 30.55 mm | 215 lbs @ 20.55 mm | 266 lbs | 18 mm | 10.5 mm | |||
EXHAUST ASSEMBLY | 90 lbs @ 34.50 mm | 190 lbs @ 24.50 mm | 254 lbs | 21.5 mm | 10.5 mm | |||
This Spring requires Ferrea Titanium Retainer # E11082 and Ferrea Spring Seat Locator # SL1068 (EXH Side) and Ferrea Spring Seat Locator # SL1069 (INT Side). (Discard OEM Spring Seat Locator) | ||||||||
WARNING: DUE TO VALVETRAIN ASSEMBLY INSTALLED HIEGHTS, MAXIMUM VALVE NET LIFT MUST NOT EXCEED 10.5 MM BECAUSE OF VALVE SEAL TO SPRING RETAINER CLEARANCES. | ||||||||
NISSAN SKYLINE 6 CYL IN LINE - 24 VALVE (NEO) - 1998-2002 | ||||||||
S10078 | Dual Spring - Turbo | 20.8 mm | 16.51 mm | 95 lbs @30 mm | 195 lbs @20 mm | 254 lbs | 17.5 mm | 12 mm |
Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11048 and BOTH, Ferrea Spring Seat Locator # SL1037 AND Factory supplied Spring Seat Locator. Maximum Retainer Step 2 mm | ||||||||
NISSAN SKYLINE 6 CYL IN LINE - 24 VALVE - (RB26) - 1989-2002 | ||||||||
S10090 | Dual Spring - Turbo | 20.8 mm | 16.51 mm | 110 lbs @39mm | 210 lbs @29mm | 254 lbs | 26.5 mm | 12 mm |
Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11057 and Ferrea Spring Seat Locator # SL1047 (Discard OEM Spring Seat Locator) | ||||||||
PORSCHE 996TT 3.6L - FLAT 6 CYL - DOHC 24 VALVE - 2000-2005 | ||||||||
S10122 | Dual Spring - Turbo | 20.8 mm | 15.88 mm | 98 lbs. @33.5 mm | 220 lbs @24.5 mm | 309 lbs | 20.0 mm | 11.2 mm |
Special Alloy | 28 mm | 20.8 mm | ||||||
This spring requires Ferrea Titanium Retainer # E11094 AND Ferrea Spring Seat Locator # SL1099. (Discard OEM Spring Seat Locators) NOTE: Ferrea Seat Locators must be installed before valve seal installation and Max Net Lift is limited to 11.20mm due to spring retainer and valve seal clearance. | ||||||||
SATURN LLO 1.9L - 1991-1998 | ||||||||
S10059 | Dual Spring - Turbo | 20.8 mm | 15.88 mm | 87lbs @ 36 mm | 195 lbs @ 26 mm | 285 lbs | 21.5 mm | 12.5 mm |
Special Alloy | 28 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11036 and Factory supplied Spring Seat Locator. TO BE USED WITH 7 MM VALVE STEM ONLY. | ||||||||
S10060 | Dual Spring - Turbo | 23.10 mm | 17.2 mm | 95 lbs | 220 lbs | 317 lbs | 20 mm | 13.5 mm |
PAC enhanced Alloy | 30 mm | 23.10 mm | @ 34 mm | @ 24 mm | ||||
This Spring requires Ferrea Titan Retainer # E11038 OR Ferrea Alum-Magne Retainer # E10028 and Ferrea | ||||||||
Spring Seat Locator # SL1029 (Discard OEM Seat Locator). TO BE USED WITH 5.5 MM VALVE STEM ONLY. | ||||||||
SCION tC 2.4L - DOHC 16 VALVE (2AZFE) - 2005 | ||||||||
S10110 | Single Spring - Turbo | 25.19 mm | 18.3 mm | 80 lbs @34.2 mm | 150 lbs @24.2 mm | 180 lbs | 20.5 mm | 12.5 mm |
Special Alloy Endurance Spring | ||||||||
This Spring requires Ferrea Titanium Retainer # E11075 and Ferrea Spring Seat Locator # SL1063 (Discard OEM Spring Seat Locator) | ||||||||
SCION tC 2.5L - DOHC 16 VALVE (2ARFE) - 2011 | ||||||||
S10143 | Single Spring | 25.19 mm | 18.3 mm | 78 lbs. @38.7mm | 160 lbs. @28.7mm | 208 lbs | 22.6 mm | 14.5 mm |
Stage 1 Endurance Application | ||||||||
This spring requires Ferrea Titanium Retainer # E11118 AND Ferrea Spring Seat Locator # SL1126. (Discard OEM Factory Spring Seat Locator) | ||||||||
S10144 | Dual Spring - Turbo | 18.82 mm | 13.84 mm | 80 lbs. @35.7mm | 180 lbs. @25.7mm | 254 lbs | 21.5 mm | 13 mm |
Stage 2 Road/Drag Application | 25.19 mm | 18.82 mm | ||||||
This spring requires Ferrea Titanium Retainer # E11117 AND Ferrea Spring Seat Locator # SL1126. | ||||||||
(Discard OEM Factory Spring Seat Locator) | ||||||||
SCION FR-S 2.0L - DOHC 16 VALVE (4U-GSE) - 2012-2013 | ||||||||
S10154 | Single Spring - Endurance | 28.0 mm | 20.8 mm | 60 lbs @34 mm | 135 lbs @24 mm | 190 lbs | 18.6 mm | 14.5 mm |
Special Alloy | ||||||||
This Spring requires Ferrea Tool Steel Retainer # E20055, and Ferrea Spring Seat Locator # SL1139. (Discard OEM Factory Spring Seat Locator). | ||||||||
S10155 | Dual Spring - Turbo | 20.8 mm | 16.51 mm | 70 lbs @34 mm | 170 lbs @24 mm | 254 lbs | 18.6 mm | 14.5 mm |
Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer #E11127, and Ferrea Spring Seat Locator # SL1140. | ||||||||
(Discard OEM Factory Spring Seat Locator). | ||||||||
SUBARU WRX - EJ20 - 2001-2008 | ||||||||
S10071 | Dual Spring - | 20.8 mm | 15.88 mm | 75 lbs @39.4 mm | 200 lbs @29.4 mm | 317 lbs | 21.5 mm | 15 mm |
Special Alloy Turbo - Drag Racing | 28 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11043 and Ferrea Spring Seat Locator # SL1034 (Discard OEM Spring Seat Locator) | ||||||||
S10072 | Dual Spring - | 20.8 mm | 16.51 mm | 70 lbs @39.4 mm | 165 lbs @29.4 mm | 241 lbs | 20 mm | 15 mm |
Special Alloy Turbo | 28 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11044 and Ferrea Spring Seat Locator # SL1034 (Discard OEM Spring Seat Locator) | ||||||||
SUBARU WRX - STI - 2004-2008 | ||||||||
S10097 | Dual Spring-Special Alloy | 20.8 mm | 15.88 mm | 90 lbs @36 mm | 215 lbs @26 mm | 317 lbs | 21.5 mm | 14mm |
Turbo - Drag Racing | 28 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11064 and Ferrea Spring Seat Locator # SL1051 (Discard OEM Spring Seat Locator) | ||||||||
S10098 | Dual Spring-Special Alloy | 20.8 mm | 16.51 mm | 80 lbs @36 mm | 180 lbs @26 mm | 254 lbs | 21.0 mm | 14mm |
Turbo-Endurance Racing | 28 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11065 and Ferrea Spring Seat Locator # SL1051 (Discard OEM Spring Seat Locator) | ||||||||
SUBARU BRZ 2.0L - DOHC 16 VALVE (FA20) - 2012-2013 | ||||||||
S10154 | Single Spring - Endurance | 28.0 mm | 20.8 mm | 60 lbs @34 mm | 135 lbs @24 mm | 190 lbs | 18.6 mm | 14.5 mm |
Special Alloy | ||||||||
This Spring requires Ferrea Tool Steel Retainer # E20055, and Ferrea Spring Seat Locator # SL1139. (Discard OEM Factory Spring Seat Locator). | ||||||||
S10155 | Dual Spring - Turbo | 20.8 mm | 16.51 mm | 70 lbs @34 mm | 170 lbs @24 mm | 254 lbs | 18.6 mm | 14.5 mm |
Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11127, and Ferrea Spring Seat Locator # SL1140. | ||||||||
(Discard OEM Factory Spring Seat Locator). | ||||||||
TOYOTA 4AG 1.6L - DOHC 16 VALVE (ATLANTIC) - 1983-1988 | ||||||||
S10080 | Single Spring - | 23.5 mm | 16.46 mm | 40 lbs @35 mm | 120 lbs @25 mm | 203 lbs | 22 mm | 12 mm |
Special Alloy | ||||||||
This Spring requires Ferrea Titanium Retainer # E11046 and Factory supplied Spring Seat Locator. | ||||||||
TOYOTA 4AGELU 1.6L - DOHC 20 VALVE - 1995-1998 | ||||||||
S10150 | Single Spring - Endurance | 20.32 mm | 14.23 mm | 40 lbs @37 mm | 133 lbs @27 mm | 236 lbs | 25.15 mm | 11 mm |
Special Alloy | ||||||||
This Spring requires Ferrea Tool Steel Retainer # E20052, Ferrea Valve Locks # K10106 and Ferrea Spring Seat Locator #SL1133. (Discard OEM Factory Spring Seat Locator). | ||||||||
TECH NOTE: Ferrea Pro Springs are designed with progressive wound coils. Assemble stacked coils of spring at the bottom, on top of spring seat locator. | ||||||||
TOYOTA 1.8L DOHC 16 VALVE (2ZZGE) 2003-2006 | ||||||||
S10123 | Dual Spring - Endurance | 19.05 mm | 13.95 mm | 70 lbs @38.5 mm | 178 lbs @28.5 mm | 274 lbs | 24 mm | 13.5 mm |
Special Alloy | 25.30 mm | 19.05 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11097 and Ferrea Spring Seat Locator # SL1105 (Discard OEM Factory supplied Spring Seat Locator) | ||||||||
TOYOTA MR2 2.0L - DOHC 16 VALVE (TURBO 3SGTE) - 1990-1995 | ||||||||
S10034 | Dual | 20.8 mm | 16.51 mm | 65 lbs @ 35 mm | 185 lbs @ 25 mm | 305 lbs | 20 mm | 14 mm |
Chrome Silicon | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11011 and BOTH, Ferrea Spring Seat Locator # SL1007 and Factory supplied Spring Seat Locator. | ||||||||
TOYOTA MR2 2.0L - DOHC 16 VALVE (3SGTE GEN3) - 1996-1998 | ||||||||
S10151 | Dual Spring - Endurance | 20.8 mm | 16.51 mm | 80 lbs @37.6 mm | 178 lbs @27.6 mm | 249 lbs | 25.1 mm | 11.5 mm |
Special Alloy | 28 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11123 and Ferrea Spring Seat Locators # SL1134. Discard OEM Factory Spring Seat Locator. | ||||||||
TOYOTA 2.0 L - DOHC 16 VALVE (3SGE) | ||||||||
S10073 | Dual Spring - Turbo | 20.8 mm | 15.88 mm | 87 lbs @34 mm | 195 lbs @24 mm | 285 lbs | 21.5 mm | 12.5 mm |
Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11042 and Ferrea Spring Seat Locator # SL1032 (Discard OEM Spring Seat Locator) | ||||||||
TOYOTA FJ CRUISER V6 4L - DOHC 24 VALVE (1GR-FE) - 2006-2008 | ||||||||
S10127 | Double Spring-Special Alloy | 20.8 mm | 16.51 mm | 75 lbs @ 35.65 mm | 175 lbs @25.65 mm | 254 lbs | 20 mm | 13mm |
Endurance | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11100 and Ferrea Spring Seat Locator # SL1110 (Discard OEM Spring Seat Locator) | ||||||||
S10132 | Single Spring-Special Alloy | 25.19mm | 18.30 mm | 80 lbs @ 36 mm | 145 lbs @ 26 mm | 165 lbs | 21 mm | 13mm |
Endurance | ||||||||
This Spring requires Ferrea Titanium Retainer # E11104 and OEM Spring Seat Locator | ||||||||
TOYOTA LANDCRUISER 4.5L - DOHC 24 VALVE (1FZFE) - 1993-1997 | ||||||||
S10126 | Double Spring-Special Alloy | 20.8 mm | 16.51 mm | 75 lbs @33 mm | 175 lbs @23 mm | 254 lbs | 17 mm | 16mm |
Endurance | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11096 and Ferrea Spring Seat Locator # SL1109 (Discard OEM Factory supplied Spring Seat Locator) | ||||||||
S10131 | Single Spring-Special Alloy | 28 mm | 20.8 mm | 67 lbs @31 mm | 150 lbs @21 mm | 210 lbs | 17 mm | 13mm |
This Spring requires OEM Steel Retainers and Ferrea Spring Seat Locator # SL1114 (Discard OEM Factory supplied Spring Seat Locator) | ||||||||
TOYOTA SUPRA 3.0L I/L 6 CYL - DOHC 24 VALVE (2JZGE-2JZGTE) - 1994-1998 | ||||||||
S10033 | Dual | 20.8 mm | 16.51 mm | 65lbs @ 35 mm | 185 lbs @ 25 mm | 305 lbs | 20 mm | 14 mm |
Chrome Silicon | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11011 and BOTH, Ferrea Spring Seat Locator # SL1001 and Factory supplied Spring Seat Locator | ||||||||
S10045 | Dual Spring - Turbo | 20.8 mm | 15.88 mm | 87 lbs @ 34 mm | 195 lbs @ 24 mm | 285 lbs | 21.5 mm | 12.5 mm |
Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11037 and BOTH, Ferrea Spring Seat Locator # SL1001 and Factory supplied Spring Seat Locator | ||||||||
NOTE: For HIGH PRESSURE use BOTH Ferrea Spring Seat Locator # SL1001 AND SL1060. (Discard OEM Spring Seat Locator) | ||||||||
HIGH PRESSURE VALUES SPEC | 100 lbs @34mm | 225 lbs @24 mm | 317 lbs | 22 mm | 10.5 mm | |||
S10109 | Dual Spring - Turbo | 20.8 mm | 15.88 mm | 115 lbs @ 34 mm | 245 lbs @ 24 mm | 330 lbs | 21.8 mm | 11 mm |
High Pressure PAC Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11037 and TWO Ferrea Spring Seat Locators: # SL1001 and # SL1060 (Discard OEM Spring Seat Locator) | ||||||||
TOYOTA SUPRA 3.0L - DOHC 24 VALVE (7MGE-TURBO 7MGTE) - 1986-1992 | ||||||||
S10120 | Dual Spring - Endurance | 19.05 mm | 13.95 mm | 70 lbs @ 34 mm | 180 lbs @ 24 mm | 280 lbs | 20 mm | 13 mm |
Special Alloy | 25.30 mm | 19.05 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11095 and Ferrea Spring Seat Locator # SL1104 (Discard OEM Spring Seat Locator) | ||||||||
TOYOTA GT86 2.0L - DOHC 16 VALVE (4U-GSE) EUROPE - 2012-2013 | ||||||||
S10154 | Single Spring - Endurance | 28.0 mm | 20.8 mm | 60 lbs @34 mm | 135 lbs @24 mm | 190 lbs | 18.6 mm | 14.5 mm |
Special Alloy | ||||||||
This Spring requires Ferrea Tool Steel Retainer # E20055, and Ferrea Spring Seat Locator # SL1139. (Discard OEM Factory Spring Seat Locator). | ||||||||
S10155 | Dual Spring - Turbo | 20.8 mm | 16.51 mm | 70 lbs @34 mm | 170 lbs @24 mm | 254 lbs | 18.6 mm | 14.5 mm |
Special Alloy | 28.0 mm | 20.8 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11127, and Ferrea Spring Seat Locator # SL1140. (Discard OEM Factory Spring Seat Locator). | ||||||||
VW 1.8T - DOHC 20 VALVE - 1998-2005 | ||||||||
S10055 | Single Spring - Turbo | 21.5 mm | 15.1 mm | 65 lbs @34.5 mm | 145 lbs @24.5 mm | 216 lbs | 22.5 mm | 11 mm |
Special Alloy | ||||||||
(Intake - 12 pieces) | ||||||||
This Spring requires Ferrea Titanium Retainer # E11031 and Ferrea Spring Seat Locator # SL1025. (Discard OEM Spring Seat Locator) | ||||||||
S10056 | Dual Spring - Turbo | 22.75 mm | 17.1 mm | 80 lbs @32.5 mm | 180 lbs @22.5 mm | 254 lbs | 20 mm | 12 mm |
Special Alloy | 29.5 mm | 22.75 mm | ||||||
(Exhaust - 8 pieces) | ||||||||
This Spring requires Ferrea Titanium Retainer # E11032 and Ferrea Spring Seat Locator # SL1026. (Discard OEM Spring Seat Locator) | ||||||||
VW BEETLE/GOLF/JETTA/RABBIT 2.5L - DOHC 20 VALVE (BTW) - 2005- 1/2 2009 | ||||||||
S10124 | Single Spring-Special Alloy | 23.5 mm | 15.8 mm | 90 lbs @39 mm | 200 lbs @29 mm | 279 lbs | 27 mm | 11mm |
Turbo-Endurance | ||||||||
This Spring requires Ferrea Titanium Retainer # E11098 and Ferrea Spring Seat Locator # SL1103 (Discard OEM Factory supplied Spring Seat Locator) | ||||||||
NOTE: Max Net Lift is limited by the Factory installed height and rocker arm bottom clearance with Ferrea Titanium Retainer | ||||||||
VW GOLF / JETTA 1.8 L - DOHC 16 VALVE (PL) - 1987-1989 VW SCIROCCO 1.8 L - DOHC 16 VALVE (PL) - 1986-1988 | ||||||||
S10115 | Dual Spring | 22.75 mm | 17.1 mm | 85 lbs @33 mm | 205 lbs @23 mm | 304 lbs | 17.5 mm | 14 mm |
Special Alloy Endurance Application | 29.5 mm | 22.75 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11084 and Ferrea Seat Locator # SL1073 (Discard OEM Spring Seat Locator) | ||||||||
VW GOLF / JETTA 1.8 L - DOHC 16 VALVE (9A) - 1990-1992 VW PASSAT 2.0 L - DOHC 16 VALVE (9A) - 1990-1994 | ||||||||
S10115 | Dual Spring | 22.75 mm | 17.1 mm | 85 lbs @33 mm | 205 lbs @23 mm | 304 lbs | 17.5 mm | 14 mm |
Special Alloy Endurance Application | 29.5 mm | 22.75 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11084 and Ferrea Seat Locator # SL1073 (Discard OEM Spring Seat Locator) | ||||||||
VW VR6 2.8L - DOHC 12 VALVE - 1992-2002 | ||||||||
S10062 | Dual Spring - Turbo | 22.75 mm | 17.1 mm | 95 lbs @32 mm | 195 lbs @22 mm | 254 lbs | 19 mm | 13 mm |
Special Alloy | 29.5 mm | 22.75 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11039 | ||||||||
VW VR6 2.8L - DOHC 24 VALVE (BDF) - 2002-2004 | ||||||||
S10087 | Single Spring | 23.5 mm | 15.7 mm | 85 lbs @39 mm | 190 lbs @29 mm | 265 lbs | 26 mm | 12 mm |
Special Alloy | ||||||||
This Spring requires Ferrea Titanium Retainer # E11063. | ||||||||
VW VR6 3.2L - DOHC 24 VALVE - 2004-2011 | ||||||||
S10148 | Dual Spring - Endurance | 18.23 mm | 13.4 mm | 75 lbs @37.5 mm | 180 lbs @27.5 mm | 266 lbs | 24.3 mm | 12 mm |
Special Alloy | 25.19 mm | 18.23 mm | ||||||
This Spring requires Ferrea Titanium Retainer # E11122 and BOTH Ferrea Spring Seat Locators # SL1131 & # SL1132 | ||||||||
VW 2.0T TSI - DOHC 16 VALVE - 2011-2013 | ||||||||
S10157 | Single Spring - Turbo | 22.38 mm | 15.52 mm | 80 lbs @37 mm | 180 lbs @27mm | 254 lbs | 24.6 mm | 11 mm |
PAC Enhanced Alloy | ||||||||
This Spring requires either Ferrea Titanium Retainer # E11129, and Ferrea Spring Seat Locator # SL1142. | ||||||||
(Discard OEM factory supplied Spring Seat Locator) NOTE: Max Net Lift is limited due to the OEM factory valve seal install height. |