Feuling High-Load Beehive Valve Springs - 5/16in. Valve Stem and Keeper Groove and .530in. Dia. Valve Guides - 1201

Made from premium stress-relieved conical ovate wire with nitrided surface heat treatment, shot-peened surface enhancements and Nano Peen polish
Feature extremely high level of fatigue life
Use a much smaller and lighter weight retainer to reduce valve weight and create quicker rev and smoother motion
Designed to handle the highest demands of performance engines with high lift, steep ramped camshafts
Allow up to 750in lift cams; no rocker box clearancing required
Available for 5/16in and 7mm valves
Kits include: High-Load BeeHive valve springs, lightweight 10 degree Titanium retainers manufactured from Ti-17 alloy and micropolished for enhanced fatigue life, machined heat treated chromoly spring seats, seat shims and valve locks and a set of premium Viton valve seals equipped with spring loaded valve stem wiper system
Spring pressures are 200 lb. at 1.850in (.635in lift), 185 lb. at 1.900in (.685in lift), 415 lb. at 1.215in and coil bind at 1.125in
Dyno proven and track tested
Made in the USA