Description

Endurance Beehive® Valve Springs with Titanium Retainers – 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″

Notes

• Must be installed at the correct open height, matching max lift to the open height spec of the valve springs.
• Feuling® BeeHive® valve spring kits are direct replacement with no machining or rocker box clearance required up to 0.574″ lift for ’98-’04 Big Twin and ’86-’03 XL and up to 0.650″ lift for ’05-’17 Twin Cam. Larger camshafts require valve guide machining for seal to retainer clearance.