Supertech Dual Valve Springs for 1999-2000 Honda Civic Si B16 B16A B16A2 B16A3 VTEC Engines

Dual Valve Springs for 1999-2000 Honda Civic Si B16 B16A B16A2 B16A3 VTEC EnginesSet of 16 Dual Valve SpringsSPR-H100DROuter Spring: OD 30.20mm - ID 22.20mmInner Spring: OD 22.20mm - ID 16.80mmType: Dual SpringPress.Seat: 85lbs @ 35.5mmMax Lift: 15.00mmCoil Bind: 18.50mmRate: 12.50mmSPR-H1002DOuter Spring: OD 29.05mm - ID 21.85mmInner Spring: OD 20.50mm - ID 15.50mmType: Dual SpringPress.Seat: 70lbs @ 33.5mmMax Lift: 14.00mmCoil Bind: 19.50mmRate: 10.00mmNote: These Dual Valve Springs require the use of Supertech Retainer Part # RET-K20A2/T2 or RET-HBK-ST - (Sold Separately)Our 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 performance & durability at high rpms. Using high quality stee