{"product_id":"champion-copper-plus-spark-plug-308","title":"Champion Copper Plus Spark Plug 308","description":"\u003ch2 data-section-id=\"rmw5tv\" data-start=\"213\" data-end=\"227\"\u003eDescription\u003c\/h2\u003e\n\u003cp data-start=\"228\" data-end=\"571\"\u003eThe \u003cstrong data-start=\"232\" data-end=\"271\"\u003eChampion Copper Plus Spark Plug 308\u003c\/strong\u003e is engineered to deliver dependable ignition performance and long-lasting durability in compatible automotive applications. Featuring a \u003cstrong data-start=\"408\" data-end=\"440\"\u003ecopper core center electrode\u003c\/strong\u003e, this spark plug provides increased conductivity and accurate heat control to support consistent combustion and good overall wear.\u003c\/p\u003e\n\u003cp data-start=\"573\" data-end=\"874\"\u003eBuilt to \u003cstrong data-start=\"582\" data-end=\"607\"\u003eISO and SAE standards\u003c\/strong\u003e, the Champion Copper Plus line is designed for proven replacement performance. Its copper core construction helps maintain the proper heat range for extended service life, while \u003cstrong data-start=\"786\" data-end=\"819\"\u003esuperior corrosion resistance\u003c\/strong\u003e supports durability in demanding operating conditions.\u003c\/p\u003e\n\u003cp data-start=\"876\" data-end=\"1106\"\u003eWith a \u003cstrong data-start=\"883\" data-end=\"896\"\u003eflat seat\u003c\/strong\u003e, \u003cstrong data-start=\"898\" data-end=\"914\"\u003ecrush washer\u003c\/strong\u003e, \u003cstrong data-start=\"916\" data-end=\"935\"\u003eresistor design\u003c\/strong\u003e, and \u003cstrong data-start=\"941\" data-end=\"982\"\u003efactory pre-gap of 0.044 in (1.12 mm)\u003c\/strong\u003e, the \u003cstrong data-start=\"988\" data-end=\"999\"\u003eRN12MC4\u003c\/strong\u003e is a reliable replacement spark plug for select BMW, Chrysler, Dodge, Mitsubishi, and Toyota applications.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1d7mrtu\" data-start=\"1108\" data-end=\"1119\"\u003eFeatures\u003c\/h2\u003e\n\u003cul data-start=\"1120\" data-end=\"1512\"\u003e\n\u003cli data-section-id=\"1spuydi\" data-start=\"1120\" data-end=\"1195\"\u003e\n\u003cp data-start=\"1122\" data-end=\"1195\"\u003e\u003cstrong data-start=\"1122\" data-end=\"1154\"\u003eCopper core center electrode\u003c\/strong\u003e improves conductivity and heat control\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"7l4ebr\" data-start=\"1196\" data-end=\"1257\"\u003e\n\u003cp data-start=\"1198\" data-end=\"1257\"\u003eBuilt to \u003cstrong data-start=\"1207\" data-end=\"1232\"\u003eISO and SAE standards\u003c\/strong\u003e for proven performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"qk3uah\" data-start=\"1258\" data-end=\"1335\"\u003e\n\u003cp data-start=\"1260\" data-end=\"1335\"\u003e\u003cstrong data-start=\"1260\" data-end=\"1284\"\u003eChampion Copper Plus\u003c\/strong\u003e design for dependable performance and durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"37gif5\" data-start=\"1336\" data-end=\"1399\"\u003e\n\u003cp data-start=\"1338\" data-end=\"1399\"\u003e\u003cstrong data-start=\"1338\" data-end=\"1371\"\u003eSuperior corrosion resistance\u003c\/strong\u003e for extended service life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1kwgyec\" data-start=\"1400\" data-end=\"1462\"\u003e\n\u003cp data-start=\"1402\" data-end=\"1462\"\u003e\u003cstrong data-start=\"1402\" data-end=\"1421\"\u003eResistor design\u003c\/strong\u003e supports reliable ignition performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"jo4bq1\" data-start=\"1463\" data-end=\"1512\"\u003e\n\u003cp data-start=\"1465\" data-end=\"1512\"\u003e\u003cstrong data-start=\"1465\" data-end=\"1486\"\u003ePre-gapped design\u003c\/strong\u003e for easier installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1a3ueyz\" data-start=\"1514\" data-end=\"1531\"\u003eSpecifications\u003c\/h2\u003e\n\u003cul data-start=\"1532\" data-end=\"2167\"\u003e\n\u003cli data-section-id=\"oj4f2o\" data-start=\"1532\" data-end=\"1563\"\u003e\n\u003cp data-start=\"1534\" data-end=\"1563\"\u003eBrand: Champion Spark Plugs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"jjo4gt\" data-start=\"1564\" data-end=\"1584\"\u003e\n\u003cp data-start=\"1566\" data-end=\"1584\"\u003ePart Number: 308\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"2jv2ld\" data-start=\"1585\" data-end=\"1607\"\u003e\n\u003cp data-start=\"1587\" data-end=\"1607\"\u003ePlug Type: RN12MC4\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"iqia62\" data-start=\"1608\" data-end=\"1648\"\u003e\n\u003cp data-start=\"1610\" data-end=\"1648\"\u003eClassification: Champion Copper Plus\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1qpht86\" data-start=\"1649\" data-end=\"1681\"\u003e\n\u003cp data-start=\"1651\" data-end=\"1681\"\u003ePart Description: Spark Plug\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"psgbmu\" data-start=\"1682\" data-end=\"1724\"\u003e\n\u003cp data-start=\"1684\" data-end=\"1724\"\u003eGround Electrode Core Material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1w81wf2\" data-start=\"1725\" data-end=\"1766\"\u003e\n\u003cp data-start=\"1727\" data-end=\"1766\"\u003eCenter Electrode Tip Material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"gsl5i7\" data-start=\"1767\" data-end=\"1791\"\u003e\n\u003cp data-start=\"1769\" data-end=\"1791\"\u003eWasher Included: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ygep3j\" data-start=\"1792\" data-end=\"1814\"\u003e\n\u003cp data-start=\"1794\" data-end=\"1814\"\u003eWasher Type: Crush\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9kzcjo\" data-start=\"1815\" data-end=\"1862\"\u003e\n\u003cp data-start=\"1817\" data-end=\"1862\"\u003eElectrical Terminal Type: Non-Removable Nut\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"kajewh\" data-start=\"1863\" data-end=\"1899\"\u003e\n\u003cp data-start=\"1865\" data-end=\"1899\"\u003ePre-Gap Size: 0.044 in \/ 1.12 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1tcgx5m\" data-start=\"1900\" data-end=\"1932\"\u003e\n\u003cp data-start=\"1902\" data-end=\"1932\"\u003eGround Electrode Quantity: 1\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"e40vn5\" data-start=\"1933\" data-end=\"1967\"\u003e\n\u003cp data-start=\"1935\" data-end=\"1967\"\u003eHex Size: 0.813 in \/ 20.650 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"gjjceq\" data-start=\"1968\" data-end=\"1997\"\u003e\n\u003cp data-start=\"1970\" data-end=\"1997\"\u003eInsulator Height: 0.12 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1euklkx\" data-start=\"1998\" data-end=\"2029\"\u003e\n\u003cp data-start=\"2000\" data-end=\"2029\"\u003eManufacturer Heat Range: 12\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"12ns31y\" data-start=\"2030\" data-end=\"2049\"\u003e\n\u003cp data-start=\"2032\" data-end=\"2049\"\u003eSeat Type: Flat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"palr3o\" data-start=\"2050\" data-end=\"2068\"\u003e\n\u003cp data-start=\"2052\" data-end=\"2068\"\u003eReach: 0.75 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ycvbgn\" data-start=\"2069\" data-end=\"2110\"\u003e\n\u003cp data-start=\"2071\" data-end=\"2110\"\u003eThread Diameter: 0.551 in \/ 14.000 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9nbfma\" data-start=\"2111\" data-end=\"2133\"\u003e\n\u003cp data-start=\"2113\" data-end=\"2133\"\u003eResistor Type: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"cf799m\" data-start=\"2134\" data-end=\"2151\"\u003e\n\u003cp data-start=\"2136\" data-end=\"2151\"\u003eHex Type: Hex\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1nt2tzg\" data-start=\"2152\" data-end=\"2167\"\u003e\n\u003cp data-start=\"2154\" data-end=\"2167\"\u003eIndexed: No\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1dixaz0\" data-start=\"2169\" data-end=\"2179\"\u003eFitment\u003c\/h2\u003e\n\u003cul data-start=\"2180\" data-end=\"2479\"\u003e\n\u003cli data-section-id=\"1f07okt\" data-start=\"2180\" data-end=\"2192\"\u003e\n\u003cp data-start=\"2182\" data-end=\"2192\"\u003eBMW 325i\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1dhe61h\" data-start=\"2193\" data-end=\"2206\"\u003e\n\u003cp data-start=\"2195\" data-end=\"2206\"\u003eBMW 325iX\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1dhf4ji\" data-start=\"2207\" data-end=\"2220\"\u003e\n\u003cp data-start=\"2209\" data-end=\"2220\"\u003eBMW 325is\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1gdrzka\" data-start=\"2221\" data-end=\"2233\"\u003e\n\u003cp data-start=\"2223\" data-end=\"2233\"\u003eBMW 528e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ge64ve\" data-start=\"2234\" data-end=\"2246\"\u003e\n\u003cp data-start=\"2236\" data-end=\"2246\"\u003eBMW 535i\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1nj4lx5\" data-start=\"2247\" data-end=\"2261\"\u003e\n\u003cp data-start=\"2249\" data-end=\"2261\"\u003eBMW 635CSi\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"57er7u\" data-start=\"2262\" data-end=\"2272\"\u003e\n\u003cp data-start=\"2264\" data-end=\"2272\"\u003eBMW L6\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"57eqff\" data-start=\"2273\" data-end=\"2283\"\u003e\n\u003cp data-start=\"2275\" data-end=\"2283\"\u003eBMW L7\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"x7wxz1\" data-start=\"2284\" data-end=\"2305\"\u003e\n\u003cp data-start=\"2286\" data-end=\"2305\"\u003eChrysler Concorde\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"mhj3bt\" data-start=\"2306\" data-end=\"2327\"\u003e\n\u003cp data-start=\"2308\" data-end=\"2327\"\u003eChrysler Intrepid\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"14go3r0\" data-start=\"2328\" data-end=\"2346\"\u003e\n\u003cp data-start=\"2330\" data-end=\"2346\"\u003eDodge Intrepid\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"npgyaa\" data-start=\"2347\" data-end=\"2368\"\u003e\n\u003cp data-start=\"2349\" data-end=\"2368\"\u003eMitsubishi Mirage\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1j2ugtt\" data-start=\"2369\" data-end=\"2386\"\u003e\n\u003cp data-start=\"2371\" data-end=\"2386\"\u003eToyota Celica\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"8cslhk\" data-start=\"2387\" data-end=\"2406\"\u003e\n\u003cp data-start=\"2389\" data-end=\"2406\"\u003eToyota Cressida\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1dqwxvd\" data-start=\"2407\" data-end=\"2425\"\u003e\n\u003cp data-start=\"2409\" data-end=\"2425\"\u003eToyota Starlet\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1pa3ejd\" data-start=\"2426\" data-end=\"2443\"\u003e\n\u003cp data-start=\"2428\" data-end=\"2443\"\u003eToyota Tercel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"xfjfop\" data-start=\"2444\" data-end=\"2458\"\u003e\n\u003cp data-start=\"2446\" data-end=\"2458\"\u003eToyota Van\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1sjkord\" data-start=\"2459\" data-end=\"2479\"\u003e\n\u003cp data-start=\"2461\" data-end=\"2479\"\u003eToyota Van Wagon\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHAMPION","offers":[{"title":"Default Title","offer_id":46284931563719,"sku":"ELE1958","price":2.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2026-03-12111125.png?v=1773338953","url":"https:\/\/mainstreeteshop.com\/products\/champion-copper-plus-spark-plug-308","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}