Supertech Single Valve Springs for Mazda 626 MX6 Protegé 2.0L FS Engines

Single Valve Springs for Mazda 626 MX6 Protegé 2.0L FS EnginesSet of 16 Single Valve SpringsSPR-MP20SOuter Spring: OD 25mm - ID 18mmInner Spring: NoneType: Single SpringPress.Seat: 58lbs @ 34.8mmMax Lift: 13.80mCoil Bind: 21.00mmRate: 7.60mmNote: These Single Valve Springs require the use of Supertech Retainer Part # RET-TS2500/T1 - (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 steel alloy also provides the added benefit of better structural memory for all of our springs, giving your performance racing engine a serious competitive advantage.