Supertech Dual Valve Springs for Nissan Skyline RB26 & RB26DETT 24v 2.6L Engines

Supertech Dual Valve Springs for Nissan Skyline RB26 & RB26DETT 24v 2.6L EnginesSet of 24 Dual Valve SpringsSPR-M1007D/RBType: Dual SpringOuter Spring: OD 28.10mm - ID 20.00mmInner Spring: OD 20.00mm - ID 15.20mmPress.Seat: 92lbs @ 40.7mm IN & 82lbs @ 40.7mm EXMax Lift: 15.30mmCoil Bind: 24.70mmRate: 12.50mmSPR-TS1015/RB26Type: Dual SpringOuter Spring: OD 27.50mm - ID 20.00mmInner Spring: OD 20.00mm - ID 15.20mmPress.Seat: 92lbs @ 33mmMax Lift: 12.30mmCoil Bind: 20.70mmRate: 12.10mmNote: These Dual Valve Springs require the use of Supertech Part #'s RET-NRB60/TS  - (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 h