Ferrea Dual Special Alloy Valve Spring - 04-21 Subaru WRX STI EJ257 - Set of 16 - S10097 Push-On EFI Adapter Please contact COBB Support if
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Ferrea Dual Special Alloy Valve Spring - 04-21 Subaru WRX STI EJ257 - Set of 16 - S10097 Push-On EFI Adapter Please contact COBB Support ifThe 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 Drag Racing Outside Diameter: 20. 8 mm 28 mm Inside Diameter: 15. 88mm 20. 8mm Seat Press:. 90lbs@36
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