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Dual springs wound from ground super clean chrome silicon wire that has been heat treated, x-rayed for inclusions, & shot peened. Fully machined and heat treated. These valve spring kits have 0.600" Valve Lift with 170-180 lb. Seat Pressure and 375-385 lb. at .600" lift. No machining required. Kits include valve springs, upper collars, lower collars and seals. Titanium retainers.
Note
Fits Harley-Davidson Twin Cam 05-17, Sportster 04-20, Buell XB 03-10 with 7 mm Valve Stems
