{"product_id":"champion-copper-plus-spark-plug-404","title":"Champion Copper Plus Spark Plug 404","description":"\u003ch2 data-section-id=\"rmw5tv\" data-start=\"216\" data-end=\"230\"\u003eDescription\u003c\/h2\u003e\n\u003cp data-start=\"231\" data-end=\"572\"\u003eThe \u003cstrong data-start=\"235\" data-end=\"274\"\u003eChampion Copper Plus Spark Plug 404\u003c\/strong\u003e is engineered to deliver dependable ignition performance and long service life in a wide range of automotive applications. Featuring a \u003cstrong data-start=\"410\" data-end=\"442\"\u003ecopper core center electrode\u003c\/strong\u003e, this spark plug provides increased conductivity and precise heat control to support consistent combustion and good overall wear.\u003c\/p\u003e\n\u003cp data-start=\"574\" data-end=\"910\"\u003eAs part of the \u003cstrong data-start=\"589\" data-end=\"613\"\u003eChampion Copper Plus\u003c\/strong\u003e line, the \u003cstrong data-start=\"624\" data-end=\"634\"\u003eRN12YC\u003c\/strong\u003e is built for reliable replacement performance with \u003cstrong data-start=\"686\" data-end=\"719\"\u003esuperior corrosion resistance\u003c\/strong\u003e and construction designed to meet \u003cstrong data-start=\"754\" data-end=\"779\"\u003eISO and SAE standards\u003c\/strong\u003e. The copper core center electrode helps maintain accurate heat range control for longer plug life and dependable engine operation.\u003c\/p\u003e\n\u003cp data-start=\"912\" data-end=\"1163\"\u003eWith a \u003cstrong data-start=\"919\" data-end=\"932\"\u003eflat seat\u003c\/strong\u003e, \u003cstrong data-start=\"934\" data-end=\"950\"\u003ecrush washer\u003c\/strong\u003e, \u003cstrong data-start=\"952\" data-end=\"971\"\u003eresistor design\u003c\/strong\u003e, and \u003cstrong data-start=\"977\" data-end=\"1018\"\u003efactory pre-gap of 0.035 in (0.89 mm)\u003c\/strong\u003e, this spark plug is a durable replacement option for classic, vintage, and standard engine applications across a wide range of makes and models.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1d7mrtu\" data-start=\"1165\" data-end=\"1176\"\u003eFeatures\u003c\/h2\u003e\n\u003cul data-start=\"1177\" data-end=\"1587\"\u003e\n\u003cli data-section-id=\"1spuydi\" data-start=\"1177\" data-end=\"1252\"\u003e\n\u003cp data-start=\"1179\" data-end=\"1252\"\u003e\u003cstrong data-start=\"1179\" data-end=\"1211\"\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=\"1253\" data-end=\"1314\"\u003e\n\u003cp data-start=\"1255\" data-end=\"1314\"\u003eBuilt to \u003cstrong data-start=\"1264\" data-end=\"1289\"\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=\"1315\" data-end=\"1392\"\u003e\n\u003cp data-start=\"1317\" data-end=\"1392\"\u003e\u003cstrong data-start=\"1317\" data-end=\"1341\"\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=\"1393\" data-end=\"1456\"\u003e\n\u003cp data-start=\"1395\" data-end=\"1456\"\u003e\u003cstrong data-start=\"1395\" data-end=\"1428\"\u003eSuperior corrosion resistance\u003c\/strong\u003e for extended service life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"15em05z\" data-start=\"1457\" data-end=\"1518\"\u003e\n\u003cp data-start=\"1459\" data-end=\"1518\"\u003e\u003cstrong data-start=\"1459\" data-end=\"1490\"\u003eAccurate heat range control\u003c\/strong\u003e supports longer plug life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"eysdk3\" data-start=\"1519\" data-end=\"1587\"\u003e\n\u003cp data-start=\"1521\" data-end=\"1587\"\u003e\u003cstrong data-start=\"1521\" data-end=\"1540\"\u003eResistor design\u003c\/strong\u003e helps maintain reliable ignition performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1a3ueyz\" data-start=\"1589\" data-end=\"1606\"\u003eSpecifications\u003c\/h2\u003e\n\u003cul data-start=\"1607\" data-end=\"2555\"\u003e\n\u003cli data-section-id=\"9ty3qu\" data-start=\"1607\" data-end=\"1626\"\u003e\n\u003cp data-start=\"1609\" data-end=\"1626\"\u003eBrand: Champion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"jix47q\" data-start=\"1627\" data-end=\"1647\"\u003e\n\u003cp data-start=\"1629\" data-end=\"1647\"\u003ePart Number: 404\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1oc0zoh\" data-start=\"1648\" data-end=\"1669\"\u003e\n\u003cp data-start=\"1650\" data-end=\"1669\"\u003ePlug Type: RN12YC\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"iqia62\" data-start=\"1670\" data-end=\"1710\"\u003e\n\u003cp data-start=\"1672\" data-end=\"1710\"\u003eClassification: Champion Copper Plus\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9kxcai\" data-start=\"1711\" data-end=\"1747\"\u003e\n\u003cp data-start=\"1713\" data-end=\"1747\"\u003eGrade Type: Standard Replacement\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1qpht86\" data-start=\"1748\" data-end=\"1780\"\u003e\n\u003cp data-start=\"1750\" data-end=\"1780\"\u003ePart Description: Spark Plug\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"suotmr\" data-start=\"1781\" data-end=\"1822\"\u003e\n\u003cp data-start=\"1783\" data-end=\"1822\"\u003eCenter Electrode Tip Material: Copper\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"42bjef\" data-start=\"1823\" data-end=\"1860\"\u003e\n\u003cp data-start=\"1825\" data-end=\"1860\"\u003eCenter Electrode Design: Standard\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"19wox35\" data-start=\"1861\" data-end=\"1899\"\u003e\n\u003cp data-start=\"1863\" data-end=\"1899\"\u003eCenter Electrode Diameter: 0.10 in\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=\"psgbmu\" data-start=\"1933\" data-end=\"1975\"\u003e\n\u003cp data-start=\"1935\" data-end=\"1975\"\u003eGround Electrode Core Material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"es7l3k\" data-start=\"1976\" data-end=\"2017\"\u003e\n\u003cp data-start=\"1978\" data-end=\"2017\"\u003eGround Electrode Tip Material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"sunzm9\" data-start=\"2018\" data-end=\"2068\"\u003e\n\u003cp data-start=\"2020\" data-end=\"2068\"\u003eGround Electrode Material: Nickel Copper Alloy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"4yhbn8\" data-start=\"2069\" data-end=\"2105\"\u003e\n\u003cp data-start=\"2071\" data-end=\"2105\"\u003ePre-Gap Size: 0.035 in \/ 0.89 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"e40vn5\" data-start=\"2106\" data-end=\"2140\"\u003e\n\u003cp data-start=\"2108\" data-end=\"2140\"\u003eHex Size: 0.813 in \/ 20.650 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"gjjceq\" data-start=\"2141\" data-end=\"2170\"\u003e\n\u003cp data-start=\"2143\" data-end=\"2170\"\u003eInsulator Height: 0.12 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1euklkx\" data-start=\"2171\" data-end=\"2202\"\u003e\n\u003cp data-start=\"2173\" data-end=\"2202\"\u003eManufacturer Heat Range: 12\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"12ns31y\" data-start=\"2203\" data-end=\"2222\"\u003e\n\u003cp data-start=\"2205\" data-end=\"2222\"\u003eSeat Type: Flat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"palr3o\" data-start=\"2223\" data-end=\"2241\"\u003e\n\u003cp data-start=\"2225\" data-end=\"2241\"\u003eReach: 0.75 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ycvbgn\" data-start=\"2242\" data-end=\"2283\"\u003e\n\u003cp data-start=\"2244\" data-end=\"2283\"\u003eThread Diameter: 0.551 in \/ 14.000 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9nbfma\" data-start=\"2284\" data-end=\"2306\"\u003e\n\u003cp data-start=\"2286\" data-end=\"2306\"\u003eResistor Type: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"gsl5i7\" data-start=\"2307\" data-end=\"2331\"\u003e\n\u003cp data-start=\"2309\" data-end=\"2331\"\u003eWasher Included: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ygep3j\" data-start=\"2332\" data-end=\"2354\"\u003e\n\u003cp data-start=\"2334\" data-end=\"2354\"\u003eWasher Type: Crush\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9kzcjo\" data-start=\"2355\" data-end=\"2402\"\u003e\n\u003cp data-start=\"2357\" data-end=\"2402\"\u003eElectrical Terminal Type: Non-Removable Nut\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"cf799m\" data-start=\"2403\" data-end=\"2420\"\u003e\n\u003cp data-start=\"2405\" data-end=\"2420\"\u003eHex Type: Hex\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1nt2tzg\" data-start=\"2421\" data-end=\"2436\"\u003e\n\u003cp data-start=\"2423\" data-end=\"2436\"\u003eIndexed: No\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"16jv32o\" data-start=\"2437\" data-end=\"2466\"\u003e\n\u003cp data-start=\"2439\" data-end=\"2466\"\u003eInstalled Height: 2.24 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"45nxxs\" data-start=\"2467\" data-end=\"2500\"\u003e\n\u003cp data-start=\"2469\" data-end=\"2500\"\u003eInsulator Projection: 0.12 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1gel3q1\" data-start=\"2501\" data-end=\"2528\"\u003e\n\u003cp data-start=\"2503\" data-end=\"2528\"\u003eTaper Diameter: 0.25 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"198zmx6\" data-start=\"2529\" data-end=\"2555\"\u003e\n\u003cp data-start=\"2531\" data-end=\"2555\"\u003eSubject to Prop 65: No\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1dixaz0\" data-start=\"2557\" data-end=\"2567\"\u003eFitment\u003c\/h2\u003e\n\u003cul data-start=\"2568\" data-end=\"3218\"\u003e\n\u003cli data-section-id=\"1obgiiu\" data-start=\"2568\" data-end=\"2942\"\u003e\n\u003cp data-start=\"2570\" data-end=\"2942\"\u003eFits a wide range of \u003cstrong data-start=\"2591\" data-end=\"2926\"\u003eAC, American Motors, Aston Martin, Audi, Austin, Austin Healey, BMW, Bentley, Buick, Chevrolet, Chrysler, Dodge, Fargo, Ford, GMC, Geo, Isuzu, Jaguar, Jeep, Land Rover, Mazda, Mercedes-Benz, MG, Morgan, Nissan, Plymouth, Pontiac, Porsche, Renault, Rolls-Royce, Saab, Studebaker, Suzuki, Toyota, Triumph, Utilimaster, and Volkswagen\u003c\/strong\u003e applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1pqi35f\" data-start=\"2943\" data-end=\"3087\"\u003e\n\u003cp data-start=\"2945\" data-end=\"3087\"\u003eCommon uses include select \u003cstrong data-start=\"2972\" data-end=\"3084\"\u003eclassic cars, vintage trucks, inline 6 engines, V8 applications, and standard replacement automotive engines\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1x2qtrn\" data-start=\"3088\" data-end=\"3218\"\u003e\n\u003cp data-start=\"3090\" data-end=\"3218\"\u003ePreserve the full application table from the original source for exact \u003cstrong data-start=\"3161\" data-end=\"3217\"\u003eyear, make, model, engine, and quantity requirements\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHAMPION","offers":[{"title":"Default Title","offer_id":46285573259463,"sku":"ELE1972","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2026-03-12142441.png?v=1773350551","url":"https:\/\/mainstreeteshop.com\/products\/champion-copper-plus-spark-plug-404","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}