{"product_id":"kpmi-valve-spring-kit-460-lift-steel-top-collars","title":"KPMI, valve spring kit. .460\" lift. Steel top collars","description":"\u003cp\u003eReduces total valve train mass. Great for racing high lift performance builds. The springs are manufactured from the highest quality clean chrome silicone wire; shot peened and heat treated for maximum fatigue life. Kit includes springs; upper collars; lower collars; and valve keys. Max valve lift: .480\". Installed height: 1.310\". Seat pressure 158 lbs. Open pressure: 340 lbs. @ .480\" valve lift. Note: Kit must be used with Kibblewhite Precision engineering (KPMI) valve guides. Stock dimensions valve guides must be shortened. Valve guide machining instructions are included with this kit.\u003c\/p\u003e","brand":"Kibblewhite","offers":[{"title":"Default Title","offer_id":53081040978248,"sku":"524452","price":179.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/524452.jpg?v=1778684957","url":"https:\/\/holydeath.com\/products\/kpmi-valve-spring-kit-460-lift-steel-top-collars","provider":"Holy Death Motorcycle Co.","version":"1.0","type":"link"}