Valve Spring Kit 66-E84Bt 20-2110

Racing Valve Spring Kit

Designed for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm

Progressively wound springs using Kobe super-clean, chromium silicon(CrSi) based wire that is heat treated and shot peened

Complete set for one engine

Made in the USA

Spring base fits 0.565" guide. Kit Includes: • 4x CrSi Valve Spring • 4x Aluminium Alloy Retainers • 4x H.T. Steel Basewashers • 4x H.T. Steel Keepers (Pairs)