Supertech Dual Valve Spring and Titanium Retainer Kit for 1994-2005 Mazda Miata 1.8L BP Engines

Dual Valve Spring and Titanium Retainer Kit for 1994-2005 Mazda Miata 1.8L BP EnginesSet of 16 Dual Valve Springs, 16 Titanium Retainers and 16 Spring SeatsSPRK-MM18DType: Dual SpringOuter Spring: OD 27.50mm - ID 20.00mmInner Spring: OD 20.00mm - ID 15.20mmPress.Seat: 89lbs @ 33.6mmMax Lift: 12.90mmCoil Bind: 20.70mmRate: 12.10mmRetainer: RET-TS60/MA2Spring: SPR-MM18DSeat: SEAT-TS/MA18I + Reuse OEM Seat 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. Supertech r