Vance & Hines High Performance Valve Spring Kit - 354500

High-performance beehive spring kits are designed with the latest advancements in valve spring technology
Springs are nano-peened, polished and 100% inspected through load testing to ensurethey exceed stringent quality standards to provide superior valve stability at high rpm range
The premium choice for a performance upgrade, they are drop-in ready; no machining of heads is required
Retainers made from 4140 chromoly steel.
Heat treated and processed to maintain high strength and lightweight design
Keepers type FMOD7 lock angle 7 deg., triple radius groove, standard install height
Equipped with chromoly spring bases
Kit comes with Viton seals designed for maximum retention of elastic properties, along with excellent resistance to fluids, heat, and aging
Spring dia. (large end) O.D. 1.445in./I.D. 1.000in.; spring dia. (small end): O.D. 1.095in./I.D. 0.650in.; installed height 180 lbs @ 1.850in. ; open load 400 lbs @ 1.250in.; spring rate 370 lbs-in.; max coil bind 1.210in.