{"product_id":"comp-cams-valve-spring-1-300in-gm-ls1-du-cca26921-1","title":"COMP Cams Valve Spring 1.300in Gm LS1 Du - cca26921-1","description":"Dual Valve Springs from COMP Cams are manufactured from Super Clean wire and subject to extensive quality control testing to deliver a valve spring assembly with superior strength, durability and valve train stability, no matter what the application. The dual spring design creates a stronger valve spring that can easily handle the increased lift found in extreme stress applications. COMP Cams Dual Valve Springs exceed the expectations of today’s engine builders and racers. PartNumber : cca26921-1 Description : Race Valve Springs; Single Piece Title : 26921-1 Valve Spring, 1.300\" GM LS1 DU AL California Proposition 65 : WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov Coil Bind Height : 1.04 Compatible .570\" Guide Diameter Spring Seat : 4731-1 Compatible Retainer : 754-1 Compatible Shims : 4753 Compatible Spring Cup (O.D. Locator) : 4709-1 Damper : No Inner Spring Inside Diameter : 0.655 Number of Springs : 2 Outer Spring Inside Diameter : 0.895 Outer Spring Outside Diameter : 1.32 Seat Height : 1.77 Seat Pressure : 135 Spring Rate : 408 Spring Type : Double Installed Pressure(lbs) : 135 Outside Diameter(in) : 1.3 Position : N\/A Inside Diameter(in) : 0.655 Open Pressure(lbs) : 400 Camshaft Type : OEM Spring Rate(lbs\/in) : 408 Coil Bind Height(in) : 1.04 Installed Height(in) : 1.77 Open Height(in) : 1.12   Engine Components::Valve Springs, Retainers ","brand":"COMP Cams","offers":[{"title":"Default Title","offer_id":42580551827711,"sku":"","price":43.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/1106\/2015\/products\/1ce4ab29799b8a7776d4a55a2b573f1b__10629.jpg?v=1647914949","url":"https:\/\/aristocrat-autosport-llc.myshopify.com\/products\/comp-cams-valve-spring-1-300in-gm-ls1-du-cca26921-1","provider":"Aristocrat Autosport ","version":"1.0","type":"link"}