Feuling Endurance Valve Spring kits

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FEULING ENDURANCE BEEHIVE valve springs are a direct bolt in replacement up to 650 lift (Twin cam/Evo/XL) and 565 lift (M8) camshafts no spring seat machining required. Machined fr om a premium grade Hi-tensile chrome silicon single conical ovate wire, shot-peened with a specially processed thermal heat treat and super NexTex finish to give these valve springs the needed fatigue life to exceed the high demands of V-Twin engines from stock to performance. FEULING BEEHIVE valve springs use a much smaller and lighter weight retainer which drastically reduces the valve weight creating a much quicker revving and smoother motion than comparable dual valve springs. FEULING endurance springs are a direct bolt-in replacement, no machining or rocker box clearancing required. Eliminate valve spring separation, maximize stability, reduce valve-train noise & harmonics! Available for 5/16", 6mm and 7mm valves FEULING BEEHIVE valve springs must be installed at the correct OPEN HEIGHT, matching max lift to the open height spec of the valve springs Kits include: FEULING ENDURACE BEEHIVE valve springs, lightweight 7 Degree Titanium heat treated retainers, machined spring seats, seat shims, valve locks and a set of premium Viton valve seals equipped with a spring loaded valve stem wiper system. Dont get stung by inferior valve springs! Quicker Revving - Smoother Motion - Light Weight Ti Retainers - Bolt in up to 650 Lift DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES Feuling does not recommend tuning beyond stock emissions standards. FITMENT OPTIONS: EVO/Twin Cam Big Twin 84-04,XL 86-03, Buell 95-02, 7 Degree Std. 5/16 valve stem and keeper groove Twin Cam 05-17, XL 04-22, XR 1200 09-13, 7 Degree, 7mm valve stem with stock triple keeper groove TC Screamin Eagle Heads with 5/16 valve stems with std keeper grooves and .530 diameter valve guides. M-Eight 17-24, stock 6mm valve stems with triple groove, Stock & SE heads Twin cam / Evo / XL Spring specs: SEAT Lbs. / INSTALLED HEIGHT198 Lbs. @ 1.685 (0.535 Lift)194 Lbs. @ 1.703 (0.553 Lift)190 Lbs. @ 1.724 (0.574 Lift)187 Lbs. @ 1.754 (0.604 Lift)185 Lbs. @ 1.780 (0.630 Lift)160 Lbs @ 1.800 (0.650 Lift)375 Lbs @ 1.150 OPEN HEIGHTCoil Bind @ 1.100 M8 Spring specs: SEAT Lbs. / INSTALLED HEIGHT134 Lbs. @ 1.375 (0.405 Lift)127 Lbs. @ 1.405 (0.435 Lift)125 Lbs. @ 1.415 (0.445 Lift)121 Lbs. @ 1.435 (0.465 Lift)116 Lbs. @ 1.455 (0.485 Lift)113 Lbs. @ 1.470 (0.500 Lift)109 Lbs. @ 1.490 (0.520 Lift)103 Lbs. @ 1.520 (0.550 Lift)226 Lbs @ 0.970 OPEN HEIGHTCoil Bind @ .920*Cam specs measured on the lifter @ 0.050 lift with 1.61 rocker arm ratio Show more