Feuling Parts – Valve Spring Kit – TI Retainers – For 5/16″ Valve Stem – EVO | Twin Cam

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.