Supertech Dual Valve Spring and Titanium Retainer Kit for Subaru BRZ FA20D 16v (Non-Turbocharged) Engines

Dual Valve Spring and Titanium Retainer Kit for Subaru BRZ FA20D 16v (Non-Turbocharged) EnginesSet of 16 Dual Valve Springs, 16 Titanium Retainers & SeatsSPRK-1002-BRZType: Dual SpringOuter Spring: OD 29.05mm - ID 21.85mmInner Spring: OD 20.50mm - ID 15.50mmPress.Seat: 74lbs @ 35.50mmMax Lift: 14.00mmCoil Bind: 19.50mmRate: 10.00mmRetainer: RET-H1000-BRZSpring: SPR-1002-BRZSeat: SEAT-H1002D-BRZSPRK-100-BRZType: Dual SpringOuter Spring: OD 30.20mm - ID 22.20mmInner Spring: OD 22.20mm - ID 16.80mmPress.Seat: 87lbs @ 33.50mmMax Lift: 15.00mmCoil Bind: 18.50mmRate: 12.50mmRetainer: RET-H1000-BRZSpring: SPR-100-BRZSeat: SEAT-H1002D-BRZOur valve springs are computer designed to ensure that wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue. We also utilize computer software that allows us to ensure that the harmonics are under control. All Supertech valve springs are made with premium super clean Chrome Silicon Vanadium Steel alloy for higher perfo