Valve Spring Kit - For 5/16" Valve Stem - Evolution Big Twin | Twin Cam | XL

Machined from premium-grade hi-tensile chrome silicon single-conical ovate wire Shot-peened with specially processed thermal heat treat and super NexTex® finish for fatigue life needed to exceed high demands of V-Twin engines Use a much smaller and lighter weight retainer to reduce valve weight and create quicker rev and smoother motion Direct bolt-in replacement up to 0.650" cam lift; no machining or rocker box clearancing required Kits include: Endurance BeeHive® valve springs, lightweight 7° super Titanium heat-treated retainers, machined spring seats, seat shims, valve locks and a set of premium Viton® valve seals equipped with spring-loaded valve stem wiper system Made in the USA Seat lb / installed height: 198 lb @ 1.685" (0.535" lift) 194 lb @ 1.703" (0.553" lift) 190 lb @ 1.724" (0.574" lift) 187 lb @ 1.754" (0.604" lift) 185 lb @ 1.780" (0.630" lift) 160 lb @ 1.800" (0.650" lift) 375 lb @ 1.150" Open Height Coil Bind @ 1.100"