FEULING PARTS Valve Spring Kit - Steel Retainers - 5/16" Valve Stem - EVO | Twin Cam

Highlights

• Made from heat treated chromoly conical ovate wire.
• Hand measured and labeled specifically based on their coil bing / required open height.
• Uses a much smaller and lighter weight retainer to reduce valve weight and create quicker rev and smoother motion.
• Dyno proven and track tested.
• Kit includes: Econo BeeHive valve springs, lightweight 7 steel or titanium retainers, machined heat-treated chromoly spring seats, seat shims, valve locks and a set of premium Viton valve seals equipped with spring-loaded valve stem wiper system.
• Up to 0.585" lift.
• Seat lb / installed height:.
• 183 lb @ 1.760" (0.510" lift).
• 175 lb @ 1.785" (0.535" lift).
• 172 lb @ 1.803" (0.553" lift).
• 165 lb @ 1.825" (0.574" lift).
• 163 lb @ 1.835" (0.585" lift).
• 380 lb @ 1.250" Open Height.
• Coil Bind @ 1.180".
• Made in the USA.
• Feuling BeeHive valve springs must be installed at the correct open height, matching max lift to the open height spec of the valve springs.
• Econo BeeHive kit is direct replacement with no machining or rocker box clearance required for cams up to 0.574" lift for '84-'04 Big Twin and '86-'03 XL and up to.585" lift for '05-'17 Twin Cam.