Description
The design and processes on these dual valve springs are optimized to reduce valvetrain harmonics and provide greater stability on high horsepower applications. We use high grade premium super-clean PAC alloy materials and maintain tight tolerances for those unique aftermarket cylinder heads.
Type/Material/Application: Dual Spring – Special Alloy Turbo – Endurance Spring
Outside Diameter: 20.8 mm/28 mm
Inside Diameter: 16.51 mm/20.8 mm
Seat Pressure: 70 lbs @ 39.4 mm
Open Pressure: 165 lbs @ 29.4 mm
Rate Inch: 241 lbs
Coil Bind: 20 mm
Max Net Lift: 15 mm
This Spring requires Ferrea Titanium Retainer # E11044 and Ferrea Spring Seat Locator # SL1034 (Discard OEM Spring Seat Locator)
Fitment:
2002:Subaru:Impreza:WRX,
2003:Subaru:Impreza:WRX,
2004:Subaru:Impreza:WRX,
2005:Subaru:Impreza:WRX,
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