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Progress Technology Suspension

Progress Technology Sport Lowering Springs

Progress Lowering Springs

Intelligent Design
Progress Technology's engineering staff has over forty years of combined experience in the design and tuning of performance suspension systems, including CART/Indy Cars, IMSA, SCCA, and SCORE competitors. Progress Technology's engineering staff are enthusiasts, and know how to build and tune performance automobiles. The Progress Technology Sport Spring designs are a product of their engineering and manufacturing expertise.

Real Quality
Manufactured from certified high-tensile SAE spring materials, utilizing sound design and manufacturing principles, and individually tested toour stringent tolerances. The PROGRESS Lifetime Warranty assures enthusiasts of our exceptional quality products.

Modern Manufacturing
Cold-wound using computer-numeric-control (CNC) automated equipment. Stress-relieved, pre-set, and shot-peened for maximum precision and durability inspected to our exacting specifications and powder-coated Bright Turquoise.


MODELYEARPart No.Drop F/R
Acura
CL 2.296-9840.10112.0/2.0
Integra94-0140.10032.1/2.1
Integra (alt. drop)94-0140.10001.6/1.6
RSX (Inc. Type S)02-0440.0102 21.5/1.4
RSX (Inc. Type S)05-0640.0103 21.5/1.4
TL04-0640.10171.3/1.5
TSX04-0640.10171.3/1.2
Chevrolet
Cavalier, all95-0440.04011.7/1.5
Cobalt05-0640.0430 21.5/2.0
HHR05-0640.04351.6/2.5
Chrysler
300C V-8 (exc. AWD)04-0640.0630 21.6/1.4
300C V-6 (exc. AWD)04-0640.0630 21.5/1.4
PT Cruiser00-0440.0610 22.0/2.3
PT Cruiser, Turbo,Conv.04-05CALL
Dodge
Caliber200640.0605
Charger (exc. AWD)200640.0630 21.5/1.4
Magnum V-8 (exc. AWD)04-0640.0630 21.6/1.4
Magnum V-6 (exc. AWD)04-0640.0630 21.5/1.4
Neon00-0440.06021.8/1.8
Neon SRT-403-0540.06031.8/1.8
Eagle
Talon - FWD95-9940.1403 3,41.5/1.5
Talon - AWD95-9940.1403 41.7/1.7
Ford
Escort, ZX291-0440.0820 2,61.7/1.5
Focus, ZX3, ZX500-0540.0840 61.8/1.8
Focus SVT01-0540.08400.7/0.9
Fusion05-0640.11401.5/1.4
Mustang V-879-9340.0801 2,3,51.7/1.5
Mustang V-679-9340.0802 2,31.7/1.5
Mustang V-894-0440.0803 2,3,51.7/1.5
Mustang V-694-0440.0804 2,31.7/1.5
Mustang V-805-0640.08071.3/1.8
Mustang V-605-0640.08081.2/1.7
Honda
Accord90-9740.1011 2,62.0/2.0
Accord 4 cyl.03-0640.1017 21.5/1.4
Accord V-603-0640.1017 21.6/1.6
Civic/CRX88-9140.10022.0/2.0
Civic with "B" engine88-9140.10042.0/2.0
Civic92-9540.10032.0/2.0
Civic, Si96-0040.1003 21.8/1.8
Civic (alternate drop)92-0040.10001.5/1.5
Civic with "H" engine92-0040.10052.0/2.0
Civic01-0340.10061.8/2.0
Civic04-0540.10061.8/2.0
Civic Si02-0340.10071.8/1.5
Civic Si04-0540.10071.8/1.5
Civic Coupe, Incl. Si06-0740.10081.3/1.2
Civic Sedan06-0740.10081.3/1.2
Del Sol93-9740.10032.0/2.0
Fit200640.10601.5/1.3
Hyundai
Tiburon02-0640.13011.5/1.3
Infiniti
G35 Coupe03-0640.15401.0/1.0
Mazda
Mazda 304-0640.11251.3/1.3
Mazda 5200640.11251.3/1.3
Mazda 603-0640.11401.5/1.4
Protege/32390-9440.08201.7/1.5
Protege99-0440.11222.0/2.0
Protege 3, Protege 599-0440.11221.5/1.5
RX779-8540.1150 7
Mitsubishi
Eclipse - FWD95-9940.1403 3,41.5/1.5
Eclipse - AWD95-9940.1403 41.7/1.7
Eclipse V600-0540.1404 31.8/1.8
Eclipse 4 cyl.00-0540.1405 3,41.8/1.8
Eclipse200640.14061.7/1.8
Galant 4 cyl. & V699-0440.1420 22.2/1.8
Lancer, incl. OZ02-0640.1430 21.5/1.0
Lancer Ralliart03-0640.1430 21.0/0.5
Lancer ES02-0540.14101.8/1.8
Mirage Coupe97-0340.14101.8/1.8
Nissan
350Z03-0640.15401.0/1.0
Altima 3.5L02-0640.1530 1TBA/TBA
Altima 2.5L02-0640.1531 1TBA/TBA
Maxima95-9940.15201.7/1.5
Maxima04-0640.15221.8/0.75
Sentra, SE-R91-9440.15091.7/1.7
Sentra, SE-R, V-Spec00-0640.15111.7/1.5
Versa2006CALL
Pontiac
Sunfire, all95-0440.04011.7/1.5
Vibe (excl. AWD)02-0640.21501.7/1.5
Saturn
Scion
tC04-0740.21801.8/1.8
xA03-0640.21701.3/1.2
xB03-0640.21701.8/1.5
Subaru
Legacy05-0640.23201.3/1.0
WRX02-0340.23101.8/1.5
WRX04-0640.23111.8/1.5
WRX Sti200440.23111.0/1.0
WRX Sti05-0640.2314
WRX200840.23111.8/1.5
Toyota
Corolla03-0640.21501.8/1.7
Matrix (excl. AWD)02-0640.21502.2/2.2
Yaris200640.21401.7/1.8
Volkswagen
Beetle99-0640.2250 1,21.8/1.5
Golf IV 4cyl99-0640.2250 1,21.8/1.5
Jetta IV VR699-0540.2250 1,21.8/1.5
Golf V2006CALL
Jetta V05-06CALL

1) Product being developed at this time. Call (714) 575-1193 for an update.
2) Dimensions may vary with year, model, & strut type.
3) Includes convertible.
4) Includes turbo & supercharger.
5) Includes Cobra, Excludes IRS
6) Excludes Wagon
7) Specified springs for NASA Pro 7 Race Series (pro7racing.com).
8) Camber kits as noted below. See page 4 for description and pictures:

51…. - front only
52…. - rear only
53…. - complete kit

9) Fits vehicles equipped with stock (OEM) rear sway bar ONLY.
10) All vehicles not equipped with stock (OEM) rear anti-roll bar require Adapter Kit part number 65.1006.
11) Adjustable rate.
12) Fits OEM or Progress lower arms part number 15.0803.
13) Rear bar includes chassis reinforcement (see photo).
14) Reinforcement bracket included.
15) NEW Front Lower Subframe Reinforcement. Attaches to lower control arm mounts and subframe for increased chassis stiffness.
16) 1988 models require 89-95 rear lower control arms.
17) Vehicles NOT equipped with stock rear bar require some OEM parts.
19) Hybrid Coil-overs, front is rebuild- able shock, rear is sealed shock.
20) Some vehicles will require OEM upper strut bearing, adapter kit part number 66.0102 or Honda part number 51726-S5A-004.
21) Front Struts fit OEM strut bearings or Ground Control camber plates ONLY.
22) Mustang Aluminum Rear Lower Control Arms. Reduces lateral rear axle motion during cornering and launch.
23) All vehicles not equipped with stock (OEM) rear anti-roll bar require Adapter Kit part number 65.0808.
24) Mustang Adjustable Rear Panhard Bar, see Ford page for additional products.
25) All vehicles will require OEM strut bearing, Adapter kit part number 66.0102 or (2) Honda part number 51726-S5A-004.
26) Replacement rear lower control arms in development, part number 15.0807.
27) Developed for track use only. This kit uses Delrin pivot bushings that may be noisy, and require regular maintenance.
28) Caster/camber plates are not recommended for vehicles equipped with coil-overs.
29) Early vehicles have horizontal endlink bolts, use part no. 61.0860. Later vehicles have vertical endlink bolts, use part no. 61.0861.

LEFT COLUMN
RIGHT COLUMN