Econo Beehive Valve Spring Kit 1121 - High Performance Valve Springs for Small Block Chevy Engines - Perfect for Racing, Hot Rods & Engine Rebuilds

ECONO. Available for 5/16" and 7mm valves. Seat lbs./installed height; 183 lb. at 1.770" (0.510" lift), 175 lbs. at 1.795" (0.535" lift), 172 lbs. at 1.813" (0.553" lift), 165 lbs. at 1.835" (0.574" lift), 160 lbs. at 1.845" (0.585" lift), 380 lb. at 1.260" OPEN HEIGHT coil bind at 1.190". Kits include: Econo BeeHive valve springs, lightweight 7 degree steel 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. Designed to handle the demands of performance engines with 585" and smaller lift camshafts. Feuling BeeHive valve springs must be installed at the correct OPEN HEIGHT, matching max lift to the open height spec of the valve springs. Dyno proven and track tested. Feature extremely high level of fatigue life. Made from premium stress-relieved conical ovate wire. Made in the U.S.A. Use a much smaller and lighter weight retainer to reduce valve weight and create quicker rev and smoother motion. ENDURANCE. Direct bolt-in replacement up to 650" cam lift; no machining or rocker box clearancing required. Shot-peened with specially processed thermal heat treat and super NexTex finish for fatigue life needed to exceed high demands of V-Twin engines. Machined from premium-grade hi-tensile chrome silicon single conical ovate wire. Feuling BeeHive valve springs must be installed at the correct OPEN HEIGHT, matching max lift to the open height spec of the valve springs. Made in the U.S.A. Kits include: Endurance BeeHive valve springs, lightweight 7 degree super Titanium heat-treated retainers, machined spring seats, seat shims, valve locks and a set of premium Viton valve seals equipped with spring-loaded valve stem wiper system. Available for 5/16" and 7mm valves. Seat lbs./installed height; 198 lbs. at 1.685" (.535" lift), 194 lbs. at 1.703" (.553" lift), 190 lb. at 1.724" (.574" lift), 187 lbs. at 1.754" (

Made from premium stress-relieved conical ovate wire with nitrided surface heat treatment, shot-peened surface enhancements and Nano Peen polish

Seat lbs./installed height; 183 lb. at 1.770" (0.510" lift), 175 lbs. at 1.795" (0.535" lift), 172 lbs. at 1.813" (0.553" lift), 165 lbs. at 1.835" (0.574" lift), 160 lbs. at 1.845" (0.585" lift), 380 lb. at 1.260" OPEN HEIGHT coil bind at 1.190"

Use a much smaller and lighter weight retainer to reduce valve weight and create quicker rev and smoother motion

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, valve locks and a set of premium Vi

Designed to handle the highest demands of performance engines with high-lift, steep-ramped camshafts