Kibblewhite Precision Complete Valve Spring Kit - .415in. Lift - 20-20425

Designed for maximum performance
Feature interference-wound, double-chrome silicone springs; heat-treated steel base washers
Available in a complete set for one engine
Include steel retainers
Made in the USA
Require machining of valve guides for special seals
NOTE: May require R-Style valves to achieve correct install height