{"product_id":"comp-cams-valve-seal-5-16in-ptfe-w-500-g-cca513-1","title":"COMP Cams Valve Seal 5\/16in PTFE W\/500 G - cca513-1","description":"COMP Cams offers a complete line of valve stem oil seals, from the stock GM o-ring to the positive-stop PTFE seal. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The o-ring seals use the standard retainer and oil splash shield. The umbrella seal is normally used when a larger than-stock diameter spring is used, and in the case of a double spring, the positive-stop PTFE seal is used. Smaller diameter Viton seals are also available for triple spring applications. Both the o-ring and the umbrella seals require no machining, but when using the PTFE seal it is necessary to disassemble the heads and machine the top of the guide with a special cutter, which can also be found on this page. PartNumber : cca513-1 Description : Positive Stop PTFE Seal; Single Piece Title : 513-1 Valve Seal, 5\/16\" PTFE W\/500 Guide California Proposition 65 : WARNING: This product contains a chemical known to the State of California to cause cancer, birth defects or other reproductive harm. Seal Outer Diameter : 0.6 Valve Guide Outer Diameter : 0.5 Valve Seal Type : Positive Stop PTFE Valve Stem Outer Diameter : 5\/16 Guide Size : .500\" Valve Size : 5\/16\" \/ .600\"   Engine Components::Valve Seals ","brand":"COMP Cams","offers":[{"title":"Default Title","offer_id":42580476297471,"sku":"","price":7.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/1106\/2015\/products\/1ce4ab29799b8a7776d4a55a2b573f1b__48135.jpg?v=1647913640","url":"https:\/\/aristocrat-autosport-llc.myshopify.com\/products\/comp-cams-valve-seal-5-16in-ptfe-w-500-g-cca513-1","provider":"Aristocrat Autosport ","version":"1.0","type":"link"}