medicSTi's 2008 STi After Market Spring Review
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Car Info: 2017 CWP WRX & 2007 SWP WRX
medicSTi's 2008 STi After Market Spring Review
All Info is Verified by Links Unless Otherwise Noted
Calculations Done Using Spring Rates Given by TIC for Factory 2008 STi
Calculations Done Using Spring Rates Given by TIC for Factory 2008 STi
Contents
A. Factory 2008 STi Spring Facts
B. After Market Springs
1. Agency Power Performance Springs
2. Cobb Tuning Sport Springs
3. Eibach Pro-Kit Springs
4. Espelir Active Down Springs
5. H&R Sport Springs
6. RaceComp Engineering Functional Lowering Springs
7. RaceComp Engineering Sport Lowering Springs
8. RSR Ti2000 Down Springs
9. Subaru JDM Pink STi Springs
10. Swift Sport Springs
11. Tanabe DF210 Springs
12. Tein S-Tech Springs
C. Springs Listed from Most Lowered to Least Lowered
D. Springs Listed from Highest to Lowest Spring Rates
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A. Factory 2008 STi Spring Facts
Link: Info Provided by TurnInConcepts after given facts by SoA
Front Spring Rate: 217lb/in
Rear Spring Rate: 194lb/in
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B. After Market Spring Facts
1. Agency Power Performance Racing Springs
Link: Agency Power Performance Racing Springs Subaru WRX STI 08+
Front Drop: 1 1/4” (32mm)
Front Spring Rate & Increase: No Info Found
Rear Drop: 3/4” (19mm)
Rear Spring Rate &Increase: No Info Found
Skid Pad: No Info Found
Cost: $250 @ Agency-Power.com
2. Cobb Tuning Sport Springs
Link: CobbTuning.com - 08 STI Sport Springs
Front Drop: 7/8” (22mm)
Front Spring Rate & Increase: Estimated Rate of 240 lb/in based on Cobb's 10% Claimed Rate Increase
Rear Drop: 7/8” (22mm)
Rear Spring Rate & Increase: Estimated Rate of 232 lb/in based on Cobb's 20% Claimed Rate Increase
Skid Pad: from 0.94 g stock to 1.02 g
Cost: $250 at RallySportDirect.com
3. Eibach Pro-Kit Springs
Link: Eibach Springs - Performance Suspension, Lowering Springs, Shocks, Sway Bars, Coil-Overs and Wheel Spacers!
Front Drop: 1” (25mm)
Front Spring Rate & Increase: No Info Found
Rear Drop: 1” (25mm)
Rear Spring Rate &Increase: No Info Found
Skid Pad: No Info Found
Cost: $270 at Vivid Racing
4. Espelir Active Down Springs
Link: None Found and Info UNVERIFIED
Front Drop: 1 1/5" (30mm)
Front Spring Rate & Increase: 241 lb/in & Estimated 11% Rate Increase
Rear Drop: 1" (25mm)
Rear Spring Rate & Increase: 162 lb/in & Estimated 16% Rate Decrease???
Skid Pad: No Info Found
Cost: No Info Found
5. H&R Sport Springs
Link: Subaru WRX & STi Coilovers, Lowering Springs & Suspension - H&R Sport Springs 2008+ Subaru Impreza WRX / STi Free Shipping
Front Drop: 1" (25mm)
Front Spring Rate & Increase: No Info Found
Rear Drop: 1" (25mm)
Rear Spring Rate & Increase: No Info Found
Skid Pad: No Info Found
Cost: $270 @ HopUpRacing.com
6. RaceComp Engineering Functional Lowering Springs *Still in Development*
Link: http://www.iwsti.com/forums/1867071-post25.html
Front Drop: 1/5”- 2/5" (5-10mm)
Front Spring Rate & Increase: No Info Found
Rear Drop: 1/5”- 2/5" (5-10mm)
Rear Spring Rate & Increase: No Info Found
Skid Pad: No Info Found
Cost: No Info Found
7. RaceComp Engineering Sport Lowering Springs *Still in Development*
Link: http://www.iwsti.com/forums/1867071-post25.html
Front Drop: 4/5” (20mm)
Front Spring Rate & Increase: No Info Found
Rear Drop: 4/5” (20mm)
Rear Spring Rate & Increase: No Info Found
Skid Pad: No Info Found
Cost: No Info Found
8. RSR Ti2000 Down Springs
Link: None Found and Info UNVERIFIED
Front Drop: 1” (25mm)
Front Spring Rate & Increase: 263 lb/in & Estimated 21% Increased Rate
Rear Drop: 3/5” (15mm)
Rear Spring Rate & Increase: 208 lb/in & Estimated 7% Increased Rate
Skid Pad: No Info Found
Cost: No Info Found
9. Subaru JDM Pink STi Springs
Link: japanparts.com : PARTS DATABASE
Front Drop: 3/5” (15mm)
Front Spring Rate & Increase: 285lb/in & Estimated 31% Increased Rate
Rear Drop: 3/5” (15mm)
Rear Spring Rate & Increase: 228lb/in & Estimated 18% Increased Rate
Skid Pad: No Info Found
Cost: $480 @ JapanParts.com
10. Swift Sport Springs
Link 1: Mann Engineering - Subaru Parts and Performance
Link 2: NASIOC - View Single Post - Coming Soon! Swift Sport Springs for 2008 STI
Front Drop: 1” (25mm)
Front Spring Rate & Increase: 143-251 lb/in & 10-15%
Rear Drop: 1” (25mm)
Rear Spring Rate &Increase: 118-235 lb/in & 10-15%
Skid Pad: No Info Found
Cost: $310 @ MannEngineering.com
11. Tanabe DF210 Springs
Link: RallySportDirect.com - Tanabe DF210 2008 Sti Springs
Front Drop: 1.1” (28mm)
Front Spring Rate & Increase: 246lb/in & No % Info Found
Rear Drop: 1.1” (28mm)
Rear Spring Rate &Increase: 174lb/in & No % Info Found
Skid Pad: No Info Found
Cost: $275 at RallySportDirect.com
12. Tein S-Tech Springs
Link: S.TECH
Front Drop: 1” (25mm)
Front Spring Rate & Increase: 252 lb/in & No % Info Found
Rear Drop: 8/10” (20mm)
Rear Spring Rate Increase: 219 lb/in & No % Info Found
Skid Pad: No Info Found
Cost: $250 at RallySportDirect.com
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C. Springs Listed from Most Lowered to Least Lowered
1. New Agency Power Performance Springs (32/19mm)
2. Espelir Active Down Springs (30/25mm)
3. Tanabe DF210 Springs (28/28mm)
4. H&R Sport Springs (25/25mm)
5. Eibach Pro-Kit Springs (25/25mm)
6. Swift Sport Springs (25/25mm)
7. Tein S-Tech Springs (25/20mm)
8. RSR Ti2000 Down Springs (25/15mm)
9. Cobb Tuning Sport Springs (22/22mm)
10. RaceComp Engineering Sport Lower Springs (20/20mm)
11. Subaru JDM Pink STi Springs (15/15mm)
12. RaceComp Engineering Functional Lowering Springs (5-10/5-10mm)
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D. Springs Listed from Highest to Lowest Spring Rates
Insufficient data at this time.
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I will do my best to update this thread with new information and springs when it becomes available or is brought to my attention
-Steven
Last edited by medicSTi; 12-16-2008 at 12:57 PM.
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