Skip to content
END OF THE YEAR SALE! UP TO 20% OFF, JUST ADD TO CART FOR DISCOUNT! FREE SHIPPING ON ALL ORDERS OVER $199 (Exclusions may apply)
END OF THE YEAR SALE! UP TO 20% OFF, JUST ADD TO CART FOR DISCOUNT! FREE SHIPPING ON ALL ORDERS OVER $199 (Exclusions may apply)
Feuling Endurance Valve Spring kits

Feuling Endurance Valve Spring kits

by FEULING PARTS
$359.95 - $599.95
$359.95
$359.95 - $599.95
$359.95

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 from 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 HEIGHT
    198 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 HEIGHT
    Coil Bind @ 1.100

M8 Spring specs:

  • SEAT Lbs. / INSTALLED HEIGHT
    134 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 HEIGHT
    Coil Bind @ .920
    *Cam specs measured on the lifter @ 0.050 lift with 1.61 rocker arm ratio