Racing Dual Valve Springs, Set of 8

Insure-against-valve-spring-fatigue-and-breakage-and-stop-that-valve-float-with-the-best-valve-springs-on-the-market!-Hand-checked-and-magnafluxed-for-top-quality.-The-Outer-spring-is-1.246"-diameter-using-.153"-wire-diameter-and-the-Inner-features-.910"-diameter-using-.113"-wire-diameter.-Together-they-will-lift-.630"-and-more-with-coil-bind-at-.800".-Valve-guide-boss-must-be-machined-for-all-dual-spring-kits. (SKU: 40370)