Dual Spring/Special Alloy/Endurance Application Outside Diam: 18.82mm/25.19mm Inside Diam: 13.84mm/18.82mm Seat Pressure: 55lbs @ 37mm Open Pressure: 155lbs @ 27mm Rate Inch: 253lbs Coil Bind: 21mm Max Net Lift: 14.5mm This Spring requires Ferrea Titanium Retainers E11085 & Ferrea Spring Seat Locators SL1093 (Discard OEM Spring Seat Locator) NOTE: To properly install Spring Seat Locator you must first remove the Valve Stem seal.
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