Supertech Dual Valve Spring and Titanium Retainer Kit for Nissan Skyline RB25 & RB25DETT Solid Lifter 24v 2.5L Engines

Supertech Dual Valve Spring and Titanium Retainer Kit for Nissan Skyline RB25 & RB25DETT Solid Lifter 24v 2.5L EnginesSet of 24 Dual Valve Springs, 24 Titanium Retainers and 24 Seats SPRK-TS1015/RB25Outer Spring: OD 27.50mm - ID 20.00mmInner Spring: OD 20.00mm - ID 15.20mmType: Dual SpringPress.Seat: 83lbs @ 35.00mmMax Lift: 14.30mmCoil Bind: 20.70mmRate: 12.10mmRetainer: RET-NVG1015/T1Spring: SPR-TS1015/RB25Seat: SEAT-RB25-I & SEAT-RB25-E 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 steel alloy also provides the added benefit of better structural memory for all of our springs, giving your performance racing engine