{"product_id":"comp-cams-valve-seals-5-16in-ptfe-1","title":"12 PTFE Seals .530\" Guide, 5\/16\" Stem","description":"\u003cp\u003e\u003cb\u003ePart #:\u003c\/b\u003e 500-12\u003c\/p\u003e\u003cp\u003eCOMP Cams offers a complete line of valve stem 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, in the case of a double spring, the positive-stop PTFE Seal is used. We also have a smaller diameter Viton Seal available for triple spring Applications.\u003c\/p\u003e\u003cp\u003eCOMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. These 500 seals have a .630\" outer diameter and fit applications with  5\/16\" valves and .530\" OD valve guides.\u003c\/p\u003e\u003cp\u003eThis product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.\u003c\/p\u003e","brand":"COMP Cams","offers":[{"title":"Default Title","offer_id":51783971111224,"sku":"C007 500-12","price":54.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/horsepower-asset-429694-4778240-square_8333496d-d8fd-4640-a164-391824d3b80a.webp?v=1774558659","url":"https:\/\/store.motormia.co\/products\/comp-cams-valve-seals-5-16in-ptfe-1","provider":"MOTORMIA","version":"1.0","type":"link"}