Racing Valve Spring Kit

Valve Spring Kit - 0.600" Lift - 74" Shovelhead '66-'E79

• 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