Description
Valve spring performance directly impacts engine reliability and rev capability—cheap springs fail under load, while properly engineered springs like Feuling’s Econo Beehive deliver consistent lift curve control and extended fatigue life. This complete kit eliminates guesswork with matched components (retainers, seats, seals, locks) designed specifically for Twin Cam engines, giving you a bolt-on upgrade that requires zero rocker box clearance work. Whether you’re building a track engine or refreshing a performance build, these dyno-proven springs handle the demands of high-lift cams while keeping rotating mass minimal for quicker throttle response.
- Premium stress-relieved wire
- Conical ovate design
- Lightweight 7° retainers
- Chromoly spring seats
- Viton® valve seals
- Spring-loaded stem wipers
- Seat lbs. 183 @ 1.770″
- Open height 380 lbs.
- Coil bind 1.190″
- Rated .585″ lift max
- No machining required
- Includes all hardware
- Dyno proven, track tested
- Made in the U.S.A.
- 84-04 Big Twin compatible
- 86-03 XL compatible
- 05-17 Twin Cam compatible
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