Supertech Dual Valve Spring Kit for Evo X

Supertech dual valve spring kits for 4B11 Evo X. Includes 16 dual springs, 16 titanium retainers and 16 valve seats. Please do all your research and consult your engine builder if necessary! Vehicle Fitment:2008-2015 Evolution X Purchase Includes:(16) Dual Valve Springs(16) Titanium Retainers(16) Valve Seats Part Number: Seat Pressure: Open Pressure: Details: SPRK-M1012-EX1 75 @ 34.50 185 @ 11.50 Max Lift: 14.50mmCoil Bind: 20.00mmRate: 9.60 lbs/mmRetainer: RET-TS55/T1-EXSpring: SPR-M1012/EX1Seat Locator: SEAT-M1015-2 + OEM seat locator SPRK-M1012-EX2 75 @ 35.30 - Discontinued SPRK-M1015-EX3 85 @ 34.50 228 @ 11.50 Max Lift: 13.80mmCoil Bind: 20.70mmRate: 12.1 lbs/mmRetainer: RET-TS55/T1-EXSpring: SPR-TS1015Seat Locator: SEAT-M1015-2 + OEM seat locator All Supertech valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for higher performance and durability at high RPM. Using high quality steel alloy also provides the added benefit of better s