Free Shipping on orders over $150*
Call Us: 1-866-381-4618
Ferrea Racing Valves

FERREA VALVE SPRINGS

Ferrea Valve Springs

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/ ApplicationO.D.I.D.Seat Press.Open Press.Rate InchCoil BindMax 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
S10027Dual Spring - Hi Pressure22.8 mm17.15 mm100 lbs @ 34 mm220 lbs @ 24 mm305 lbs20 mm13.5 mm
Special Alloy30.10 mm22.88 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)
S10064Dual Spring - Turbo22.88 mm17.15 mm95 lbs @34 mm215 lbs @24 mm305 lbs19 mm14 mm
Special Alloy-30.10 mm22.88 mm
Hi Pressure
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1000 (Discard OEM Spring Seat Locator)
S10070Dual Spring -22.85 mm17.5 mm80 lbs @33 mm190 lbs @23 mm279 lbs18 mm14 mm
Special Alloy30.45 mm22.85 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
S10086Dual Spring22.85mm17.5mm110 lb @ 34mm260 lb @ 21mm292 lbs20 mm13 mm
Special Alloy30.45mm22.85mm
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
S10104Dual Spring - Turbo -23.10 mm17.2mm80 lbs @34 mm195 lbs @24 mm292 lbs20 mm13.5 mm
PAC enhanced Alloy30mm23.10mm
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
S10099Dual Spring-Special Alloy22.85 mm17.5 mm @40 mm80 lbs @30 mm190 lbs279 lbs24 mm
Endurance Spring30.45 mm22.85 mm
This Spring requires Ferrea Titanium Retainer # E11066 and Ferrea Spring Seat Locator # SL1052
(Discard OEM Spring Seat Locator).
S10100Dual Spring-Chrome Silicon 23.1 mm 17.35 mm 105 lbs @ 39 mm225 lbs @ 29 mm305 lbs22 mm15 mm
Drag Racing31 mm23.1 mm
This Spring requires Ferrea Titanium Retainer # E11066 and Ferrea Spring Seat Locator # SL1053 (Discard OEM Spring Seat Locator)
S10149Dual Spring - PAC Enhanced 22.86 mm 16.86 mm 140 lbs @40 mm265 lbs @30 mm317 lbs20 mm18.4 mm
High Lift Drag Racing30.38 mm22.86 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
S10046Dual20.8 mm16.51 mm60 lbs @ 36.5 mm160 lbs @ 26.5 mm254 lbs20 mm14 mm
Chrome Silicon28.0 mm20.8 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
S10125Double Spring-Special Alloy20.8 mm16.51 mm @31.5 mm75 lbs @21.5 mm 175 lbs254 lbs17 mm
Endurance28.0 mm20.8 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
S10055Single Spring - Turbo21.5 mm15.1 mm65 lbs @ 34.5 mm145 lbs @ 24.5 mm216 lbs22.5 mm11 mm
Special Alloy
(Intake - 12 pieces)
This Spring requires Ferrea Titanium Retainer # E11031 and Ferrea Spring Seat Locator # SL1025 (Discard OEM Spring Seat Locator).
S10056Dual Spring - Turbo22.75 mm17.1 mm80 lbs @ 32.5 mm180 lbs @ 22.5 mm254 lbs20 mm12 mm
Special Alloy29.5 mm22.75 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
S10121Single Spring23.5 mm15.8 mm90 lbs @ 39 mm200 lbs @ 29mm279 lbs27 mm11 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
S10157Single Spring - Turbo22.38 mm15.52 mm80 lbs @37 mm180 lbs @27mm 254 lbs24.6 mm11 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
S10055Single Spring - Turbo21.5 mm15.1 mm65 lbs @ 34.5 mm145 lbs @ 24.5 mm216 lbs22.5 mm11 mm
Special Alloy
(Intake - 18 pieces)
This Spring requires Ferrea Titanium Retainer # E11031 and Ferrea Spring Seat Locator # SL1025 (Discard OEM Spring Seat Locator).
S10056Dual Spring - Turbo22.75 mm17.1 mm80 lbs @ 32.5 mm180 lbs @ 22.5 mm254 lbs20 mm12 mm
Special Alloy29.5 mm22.75 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
S10055Single Spring - Turbo21.5 mm15.1 mm65 lbs @ 34.5 mm145 lbs @ 24.5 mm216 lbs22.5 mm11 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
S10056Dual Spring - Turbo22.75 mm17.1 mm80 lbs @ 32.5 mm180 lbs @ 22.5 mm254 lbs20.5 mm12 mm
Special Alloy29.5 mm22.75 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 Spring22.75 mm17.1 mm85 lbs @ 33 mm205 lbs @ 23 mm304 lbs17.5 mm14 mm
Special Alloy 29.5 mm22.75 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) - 1994-1995
AUDI S4 2.2 L - DOHC 20 VALVE (AAN) - 1992-1994
AUDI S6 2.2 L - DOHC 20 VALVE (AAN) - 1995
S10115Dual Spring22.75 mm17.1 mm85 lbs @ 33 mm205 lbs @ 23 mm304 lbs17.5 mm14 mm
Special Alloy29.5 mm22.75 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
S10115Dual Spring22.75 mm17.1 mm85 lbs @ 33 mm205 lbs @ 23 mm304 lbs17.5 mm14 mm
Special Alloy29.5 mm22.75 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
S10049Dual Spring - Turbo22.75 mm17.1 mm80 lbs @ 36 mm180 lbs @ 26 mm254 lbs21 mm14 mm
Special Alloy29.5 mm22.75 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
S10156Dual Spring - Endurance20.8 mm16.51 mm85 lbs @41 mm185 lbs @31 mm 254 lbs26.5 mm14.0 mm
Special Alloy28.0 mm20.8 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
S10158Single Spring - Turbo22.38 mm15.52 mm70 lbs @36.5mm170 lbs @26.5mm254 lbs23.15 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
S10107Dual Spring - Turbo20.8 mm16.51 mm90 lbs @37 mm200 lbs @27 mm 279 lbs23 mm12 mm
Stage 1 - Special Alloy28.0 mm20.8 mm
This Spring requires Ferrea Titanium Retainer # E11073 and BOTH, Ferrea Spring Seat Locator # SL1061 and Factory supplied Spring Seat Locator.
S10108Dual Spring - Turbo20.8 mm15.88 mm105 lbs @37 mm235 lbs @27 mm330 lbs23.5 mm12 mm
Stage 2 - Special Alloy28.0 mm20.8 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
S10040Single Spring24.70 mm18.23 mm60 lbs @ 31.5 mm140 lbs @ 21.5 mm 203 lbs18.5 mm12.5 mm
Special Alloy
This Spring requires Ferrea Titanium Retainer # E11018 and both, Ferrea Spring Seat Locator # SL1020 and Factory supplied Spring Seat Locator.
S10041Dual Spring - Turbo18.23 mm13.40 mm75 lbs @32.75mm195 lbs @22.75mm305 lbs18.75 mm13.5 mm
Special Alloy24.70 mm18.23 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
S10040Single Spring24.70 mm18.23 mm60 lbs @ 31.5 mm140 lbs @ 21.5 mm 203 lbs18.5 mm12.5 mm
Special Alloy
This Spring requires Ferrea Titanium Retainer # E11018 and BOTH, Ferrea Spring Seat Locator # SL1014 and Factory supplied Spring Seat Locator.
S10041Dual Spring - Turbo18.23 mm13.40 mm75 lbs @ 32.75 mm195 lbs @ 22.75 mm305 lbs18.75 mm13.5 mm
Special Alloy¬24.70 mm18.23 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
S10047Dual Spring - Turbo18.23 mm13.40 mm70 lbs @ 35.5 mm175 lbs @ 25.5 mm266 lbs18.75 mm 14 mm
Special Alloy24.70 mm18.23 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
S10057Dual Spring - Turbo20.8 mm16.51 mm75 lbs @ 32.5 mm175 lbs @ 22.5 mm 254 lbs17.5 mm14 mm
Special Alloy28 mm20.8 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 mm210 lbs @ 21 mm12.5 mm
GM 5 CYLINDER - L5 - 2002-2006
S10058Dual Spring - Turbo20.8 mm16.51 mm85 lbs @ 32 mm185 lbs @ 22 mm254 lbs17.5 mm13.5 mm
Special Alloy28 mm20.8 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)
S10063Dual Spring22.6 mm16.55 mm150 lbs @35.6 mm450 lbs @19 mm462 lbs18 mm16.5 mm
Special Alloy30.86 mm22.6 mm
Maximum Retainer step 1.9 mm
HONDA ACCORD 2.2L - SOHC 16 VALVE (F22B2-F22B6) - 1994-1995
S10064Dual Spring - Turbo22.88 mm17.15 mm95 lbs @34 mm215 lbs @24 mm305 lbs19 mm14 mm
Special Alloy- Hi Pressure 30.10 mm22.88 mm
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1000 (Discard OEM Spring Seat Locator)
S10070Dual Spring -22.85 mm17.5 mm80 lbs @33 mm190 lbs @23 mm279 lbs18 mm14 mm
Special Alloy Endurance Spring30.45 mm22.85 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
S10104Dual Spring - Turbo -23.10 mm17.2mm80 lbs @34 mm195 lbs @24 mm292 lbs20 mm13.5 mm
PAC enhanced Alloy30mm23.10mm
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
S10029Single Spring22.9 mm15.35 mm60 lbs @ 50 mm155 lbs @ 40 mm241 lbs32 mm17 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
S10027Dual Spring - Hi Pressure22.8 mm17.15 mm100 lbs @ 34 mm220 lbs @ 24 mm305 lbs20 mm13.5 mm
Special Alloy30.10 mm22.88 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)
S10064Dual Spring - Turbo22.88 mm17.15 mm95 lbs @34 mm215 lbs @24 mm305 lbs19 mm14 mm
Special Alloy- Hi Pressure30.10 mm22.88 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
S10070Dual Spring -22.85 mm17.5 mm80 lbs @33 mm190 lbs @23 mm279 lbs18 mm14 mm
Special Alloy Endurance Spring30.45 mm22.85 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
S10086Dual Spring22.85mm17.5mm110 lb @ 34mm260 lb @ 21mm292 lbs20 mm13 mm
Special Alloy Endurance Application30.45mm22.85mm
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
S10104Dual Spring - Turbo -23.10 mm17.2mm80 lbs @34 mm195 lbs @24 mm292 lbs20 mm13.5 mm
PAC enhanced Alloy30mm23.10mm
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
S10027Dual Spring - Hi Pressure22.88 mm17.15 mm100 lbs @ 34 mm220 lbs @ 24 mm305 lbs20 mm13.5 mm
Special Alloy30.10 mm22.88 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)
S10064Dual Spring - Turbo22.88 mm17.15 mm95 lbs @34 mm215 lbs @24 mm305 lbs19 mm14 mm
Special Alloy- Hi Pressure30.10 mm22.88 mm
This Spring requires Ferrea Titanium Retainer # E11000 and Ferrea Spring Seat Locator # SL1000 (Discard OEM Spring Seat Locator)
S10070Dual Spring -22.85 mm17.5 mm80 lbs @33 mm190 lbs @23 mm279 lbs18 mm14 mm
Special Alloy Endurance Spring30.45 mm22.85 mm
This Spring requires Ferrea Titanium Retainer # E11000 and BOTH, Ferrea Spring Seat Locator # SL1003 AND Factory supplied Spring Seat Locator.
S10104Dual Spring - Turbo -23.10 mm17.2mm80 lbs @34 mm195 lbs @24 mm292 lbs20 mm13.5 mm
PAC enhanced Alloy30mm23.10mm
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
S10074Dual Spring -22.85 mm17.5 mm90 lbs @42 mm210 lbs @32 mm292 lbs28 mm13 mm
Special Alloy Turbo - Endurance Spring30.45 mm22.85 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
S10118Dual Spring - Turbo20.8 mm16.51 mm75 lbs. @36 mm175 lbs @26 mm 254 lbs(*)12 mm
Special Alloy28 mm20.8 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
S10134Single Spring25.19 mm18.3 mm90 lbs @34.85 mm152 lbs @24.85 mm157 lbs21.6 mm12.5 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
S10094Dual Spring - Turbo20.8 mm15.88 mm85 lbs @32mm200 lbs @22mm 291 lbs17 mm19 mm
Special Alloy28.0 mm20.8 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
S10081Single Spring -25.19 mm18.3 mm80 lbs @34 mm150 lbs @24 mm180 lbs20.5 mm12.5 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
S10145Single Spring23.5 mm15.8 mm90 lbs. @39.9 mm210 lbs @29 mm287 lbs28 mm11 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
S10123Dual Spring - Endurance19.05 mm13.95 mm75 lbs @ 38.5 mm180 lbs @ 28.5 mm274 lbs24 mm13.5 mm
Special Alloy25.30 mm19.05 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
S10138Dual Spring - Turbo19.05 mm13.95 mm75 lbs @ 33 mm195 lbs @ 23 mm305 lbs19 mm13.5 mm
Special Alloy25.3 mm19.05 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
S10111Dual Spring - Turbo18.20 mm13.4 mm95 lbs @42.5mm210 lbs @32.5mm292 lbs30 mm10.5 mm
Special Alloy24.70 mm18.20 mm
This Spring requires Ferrea Titanium Retainer # E11080, Ferrea Spring Seat Locator # SL1067 AND Factory supplied Spring Seat Locator.
Part#Type/Material/ ApplicationO.D.I.D.Seat Press.Open Press.Rate InchCoil BindMax Net Lift
MITSUBISHI 3000 GT 3.0L - DOHC 24 VALVE (6G72-TURBO 6G72T) - 1990-2001
S10037Dual Spring - Turbo -23.10 mm17.2mm80 lbs @34 mm195 lbs @24 mm292 lbs20 mm13.5 mm
PAC enhanced Alloy30mm23.10mm
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
S10031Dual23.1 mm17.35 mm90 lbs @ 38 mm210 lbs @ 28 mm305 lbs21 mm15 mm
Chrome Silicon31 mm23.1 mm
This Spring requires Ferrea Titanium Retainer # E11005 and Ferrea Spring Seat Locator # SL1002 (Discard OEM Spring Seat Locator)
S10036Dual Spring - Turbo22.75 mm17.1 mm80 lbs @ 34 mm180 lbs @ 24 mm254 lbs20 mm13.5 mm
Special Alloy29.5 mm22.75 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
S10084Dual Spring - Turbo22.85 mm17.5 mm95 lbs @30.6 mm225 lbs @20.6 mm327 lbs18 mm12.5 mm
Special Alloy30.45 mm22.85 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
S10118Dual Spring-Endurance20.8 mm16.51 mm75 lbs @36 mm175 lbs @26 mm254 lbs(*)12 mm
Special Alloy28 mm20.8 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
S10039Dual Spring20.8 mm15.3 mm80 lbs @ 35 mm200 lbs @ 25 mm305 lbs22 mm13 mm
Chrome Silicon28.0 mm20.8 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
S10091Single Spring25.19mm18.3mm75 lbs @34.8mm145 lbs @24.8mm178 lbs20.5 mm12.5 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
S10093Single Spring25.19mm18.3mm85 lbs @34mm155 lbs @24mm178 lbs20.5 mm12.5 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
S10103Dual Spring -20.8 mm15.88mm80 lbs @34mm200 lbs @24mm305 lbs19 mm13 mm
Special Alloy - Turbo Street/Drag28.0 mm20.8 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
S10043Dual Spring - Turbo23.10 mm17.2 mm80 lbs @36 mm195 lbs @26 mm254 lbs22 mm12.5 mm
PAC enhanced Alloy30 mm23.10 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
S10136Dual Spring - Turbo20.8 mm15.88 mm
Special Alloy28.0 mm20.8 mm
INTAKE ASSEMBLY90 lbs @37.5 mm212 lbs @27.5 mm309.6 lbs 23.5 mm13 mm
EXHAUST ASSEMBLY90 lbs @34.35 mm212 lbs @24.35 mm309.6 lbs 19.6 mm13.5 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)
S10137Single Spring Special Alloy25.19 mm18.3 mm90 lbs @ 35mm160 lbs @25mm177 lbs22.65 mm11 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
S10128Dual Spring - Chr Silicon23.1 mm17.35 mm70 lbs @40.6mm195 lbs @30.6mm317 lbs20.5 mm14.15 mm
Endurance31 mm23.1 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
S10114Dual Spring - Turbo20.8 mm16.51 mm85 lbs @36.85mm190 lbs @26.85mm266 lbs22.85 mm 12 mm
Special Alloy28.0 mm20.8 mm
This Spring requires Ferrea Titanium Retainer # E11083 and Ferrea Spring Seat Locator # SL1070
Discard OEM Factory supplied Spring Seat Locator.
S10133Single Spring28.0 mm20.8 mm73 lbs @35.85 mm155 lbs @25.85 mm208 lbs22.85 mm12 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
S10038Dual Spring - Turbo23.10 mm17.2 mm80 lbs @ 34 mm195 lbs @ 24 mm254 lbs22 mm12.5 mm
PAC enhanced Alloy30 mm23.10 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
S10083Single Spring - Turbo25.19 mm18.4 mm80 lbs @34 mm150 lbs @24 mm180 lbs20.5 mm12.5 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
S10112Dual Spring - Turbo20.8 mm16.51 mm
Special Alloy28.0 mm20.8 mm
INTAKE ASSEMBLY110 lbs @ 30.55 mm215 lbs @ 20.55 mm266 lbs18 mm10.5 mm
EXHAUST ASSEMBLY90 lbs @ 34.50 mm190 lbs @ 24.50 mm254 lbs21.5 mm10.5 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
S10078Dual Spring - Turbo20.8 mm16.51 mm95 lbs @30 mm195 lbs @20 mm254 lbs17.5 mm12 mm
Special Alloy28.0 mm20.8 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
S10090Dual Spring - Turbo20.8 mm16.51 mm110 lbs @39mm210 lbs @29mm254 lbs26.5 mm12 mm
Special Alloy28.0 mm20.8 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
S10122Dual Spring - Turbo20.8 mm15.88 mm98 lbs. @33.5 mm220 lbs @24.5 mm309 lbs20.0 mm11.2 mm
Special Alloy28 mm20.8 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
S10059Dual Spring - Turbo20.8 mm15.88 mm87lbs @ 36 mm195 lbs @ 26 mm285 lbs21.5 mm12.5 mm
Special Alloy28 mm20.8 mm
This Spring requires Ferrea Titanium Retainer # E11036 and Factory supplied Spring Seat Locator. TO BE USED WITH 7 MM VALVE STEM ONLY.
S10060Dual Spring - Turbo23.10 mm17.2 mm95 lbs220 lbs317 lbs20 mm13.5 mm
PAC enhanced Alloy30 mm23.10 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
S10110Single Spring - Turbo25.19 mm18.3 mm80 lbs @34.2 mm150 lbs @24.2 mm180 lbs20.5 mm12.5 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
S10143Single Spring25.19 mm18.3 mm78 lbs. @38.7mm160 lbs. @28.7mm208 lbs22.6 mm14.5 mm
Stage 1 Endurance Application
This spring requires Ferrea Titanium Retainer # E11118 AND Ferrea Spring Seat Locator # SL1126. (Discard OEM Factory Spring Seat Locator)
S10144Dual Spring - Turbo18.82 mm13.84 mm80 lbs. @35.7mm180 lbs. @25.7mm254 lbs21.5 mm13 mm
Stage 2 Road/Drag Application25.19 mm18.82 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
S10154Single Spring - Endurance28.0 mm20.8 mm60 lbs @34 mm135 lbs @24 mm 190 lbs18.6 mm14.5 mm
Special Alloy
This Spring requires Ferrea Tool Steel Retainer # E20055, and Ferrea Spring Seat Locator # SL1139. (Discard OEM Factory Spring Seat Locator).
S10155Dual Spring - Turbo20.8 mm16.51 mm70 lbs @34 mm170 lbs @24 mm254 lbs18.6 mm14.5 mm
Special Alloy28.0 mm20.8 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
S10071Dual Spring -20.8 mm15.88 mm75 lbs @39.4 mm200 lbs @29.4 mm317 lbs21.5 mm15 mm
Special Alloy Turbo - Drag Racing28 mm20.8 mm
This Spring requires Ferrea Titanium Retainer # E11043 and Ferrea Spring Seat Locator # SL1034 (Discard OEM Spring Seat Locator)
S10072Dual Spring -20.8 mm16.51 mm70 lbs @39.4 mm165 lbs @29.4 mm241 lbs20 mm15 mm
Special Alloy Turbo28 mm20.8 mm
This Spring requires Ferrea Titanium Retainer # E11044 and Ferrea Spring Seat Locator # SL1034 (Discard OEM Spring Seat Locator)
SUBARU WRX - STI - 2004-2008
S10097Dual Spring-Special Alloy20.8 mm15.88 mm90 lbs @36 mm215 lbs @26 mm317 lbs21.5 mm14mm
Turbo - Drag Racing28 mm20.8 mm
This Spring requires Ferrea Titanium Retainer # E11064 and Ferrea Spring Seat Locator # SL1051 (Discard OEM Spring Seat Locator)
S10098Dual Spring-Special Alloy20.8 mm16.51 mm80 lbs @36 mm180 lbs @26 mm254 lbs21.0 mm14mm
Turbo-Endurance Racing28 mm20.8 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
S10154Single Spring - Endurance28.0 mm20.8 mm60 lbs @34 mm135 lbs @24 mm 190 lbs18.6 mm14.5 mm
Special Alloy
This Spring requires Ferrea Tool Steel Retainer # E20055, and Ferrea Spring Seat Locator # SL1139. (Discard OEM Factory Spring Seat Locator).
S10155Dual Spring - Turbo20.8 mm16.51 mm70 lbs @34 mm170 lbs @24 mm254 lbs18.6 mm14.5 mm
Special Alloy28.0 mm20.8 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
S10080Single Spring -23.5 mm16.46 mm40 lbs @35 mm120 lbs @25 mm203 lbs22 mm12 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
S10150Single Spring - Endurance20.32 mm14.23 mm40 lbs @37 mm133 lbs @27 mm236 lbs25.15 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
S10123Dual Spring - Endurance19.05 mm13.95 mm70 lbs @38.5 mm178 lbs @28.5 mm 274 lbs24 mm13.5 mm
Special Alloy25.30 mm19.05 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
S10034Dual20.8 mm16.51 mm65 lbs @ 35 mm185 lbs @ 25 mm305 lbs20 mm14 mm
Chrome Silicon28.0 mm20.8 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
S10151Dual Spring - Endurance20.8 mm16.51 mm80 lbs @37.6 mm178 lbs @27.6 mm249 lbs25.1 mm11.5 mm
Special Alloy28 mm20.8 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)
S10073Dual Spring - Turbo20.8 mm15.88 mm87 lbs @34 mm195 lbs @24 mm285 lbs21.5 mm12.5 mm
Special Alloy28.0 mm20.8 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
S10127Double Spring-Special Alloy20.8 mm16.51 mm75 lbs @ 35.65 mm175 lbs @25.65 mm254 lbs20 mm13mm
Endurance28.0 mm20.8 mm
This Spring requires Ferrea Titanium Retainer # E11100 and Ferrea Spring Seat Locator # SL1110 (Discard OEM Spring Seat Locator)
S10132Single Spring-Special Alloy25.19mm18.30 mm80 lbs @ 36 mm145 lbs @ 26 mm165 lbs21 mm13mm
Endurance
This Spring requires Ferrea Titanium Retainer # E11104 and OEM Spring Seat Locator
TOYOTA LANDCRUISER 4.5L - DOHC 24 VALVE (1FZFE) - 1993-1997
S10126Double Spring-Special Alloy20.8 mm16.51 mm75 lbs @33 mm175 lbs @23 mm 254 lbs17 mm16mm
Endurance28.0 mm20.8 mm
This Spring requires Ferrea Titanium Retainer # E11096 and Ferrea Spring Seat Locator # SL1109 (Discard OEM Factory supplied Spring Seat Locator)
S10131Single Spring-Special Alloy28 mm20.8 mm67 lbs @31 mm150 lbs @21 mm210 lbs17 mm13mm
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
S10033Dual20.8 mm16.51 mm65lbs @ 35 mm185 lbs @ 25 mm305 lbs20 mm14 mm
Chrome Silicon28.0 mm20.8 mm
This Spring requires Ferrea Titanium Retainer # E11011 and BOTH, Ferrea Spring Seat Locator # SL1001 and Factory supplied Spring Seat Locator
S10045Dual Spring - Turbo20.8 mm15.88 mm87 lbs @ 34 mm195 lbs @ 24 mm285 lbs21.5 mm12.5 mm
Special Alloy28.0 mm20.8 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 SPEC100 lbs @34mm225 lbs @24 mm317 lbs22 mm10.5 mm
S10109Dual Spring - Turbo20.8 mm15.88 mm115 lbs @ 34 mm245 lbs @ 24 mm330 lbs21.8 mm11 mm
High Pressure PAC Alloy28.0 mm20.8 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
S10120Dual Spring - Endurance19.05 mm13.95 mm70 lbs @ 34 mm180 lbs @ 24 mm280 lbs20 mm13 mm
Special Alloy25.30 mm19.05 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
S10154Single Spring - Endurance28.0 mm20.8 mm60 lbs @34 mm135 lbs @24 mm190 lbs18.6 mm14.5 mm
Special Alloy
This Spring requires Ferrea Tool Steel Retainer # E20055, and Ferrea Spring Seat Locator # SL1139. (Discard OEM Factory Spring Seat Locator).
S10155Dual Spring - Turbo20.8 mm16.51 mm70 lbs @34 mm170 lbs @24 mm254 lbs18.6 mm14.5 mm
Special Alloy28.0 mm20.8 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
S10055Single Spring - Turbo21.5 mm15.1 mm65 lbs @34.5 mm145 lbs @24.5 mm216 lbs22.5 mm11 mm
Special Alloy
(Intake - 12 pieces)
This Spring requires Ferrea Titanium Retainer # E11031 and Ferrea Spring Seat Locator # SL1025. (Discard OEM Spring Seat Locator)
S10056Dual Spring - Turbo22.75 mm17.1 mm80 lbs @32.5 mm180 lbs @22.5 mm254 lbs20 mm12 mm
Special Alloy29.5 mm22.75 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
S10124Single Spring-Special Alloy23.5 mm15.8 mm90 lbs @39 mm200 lbs @29 mm279 lbs27 mm11mm
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
S10115Dual Spring22.75 mm17.1 mm85 lbs @33 mm205 lbs @23 mm304 lbs17.5 mm14 mm
Special Alloy Endurance Application29.5 mm22.75 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
S10115Dual Spring22.75 mm17.1 mm85 lbs @33 mm205 lbs @23 mm304 lbs17.5 mm14 mm
Special Alloy Endurance Application29.5 mm22.75 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
S10062Dual Spring - Turbo22.75 mm17.1 mm95 lbs @32 mm195 lbs @22 mm254 lbs19 mm13 mm
Special Alloy29.5 mm22.75 mm
This Spring requires Ferrea Titanium Retainer # E11039
VW VR6 2.8L - DOHC 24 VALVE (BDF) - 2002-2004
S10087Single Spring23.5 mm15.7 mm85 lbs @39 mm190 lbs @29 mm265 lbs26 mm12 mm
Special Alloy
This Spring requires Ferrea Titanium Retainer # E11063.
VW VR6 3.2L - DOHC 24 VALVE - 2004-2011
S10148Dual Spring - Endurance18.23 mm13.4 mm75 lbs @37.5 mm180 lbs @27.5 mm266 lbs24.3 mm12 mm
Special Alloy25.19 mm18.23 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
S10157Single Spring - Turbo22.38 mm15.52 mm80 lbs @37 mm180 lbs @27mm254 lbs24.6 mm11 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.
LEFT COLUMN
RIGHT COLUMN