{"product_id":"champion-copper-plus-spark-plug-rn5c-part-number-123","title":"Champion Copper Plus Spark Plug RN5C – Part Number 123","description":"\u003cp data-start=\"150\" data-end=\"482\"\u003e\u003cstrong data-start=\"150\" data-end=\"166\"\u003eDescription:\u003c\/strong\u003e\u003cbr data-start=\"166\" data-end=\"169\"\u003eThe Champion Copper Plus RN5C Spark Plug is engineered to provide dependable ignition performance, reliable heat control, and long service life. Built with a copper core center electrode, this plug delivers strong conductivity and accurate heat range control to help reduce wear and support consistent combustion.\u003c\/p\u003e\n\u003cp data-start=\"484\" data-end=\"926\"\u003eAs part of the Champion Copper Plus Small Engine line, the RN5C is designed as an OE-type replacement plug for a wide range of compatible engines. Its resistor design helps suppress ignition interference for smoother operation, while the corrosion-resistant construction supports durability in demanding use. Manufactured to ISO and SAE standards, it offers proven performance and fit for automotive, small engine, and specialty applications.\u003c\/p\u003e\n\u003cp data-start=\"928\" data-end=\"1079\"\u003eWith a flat seat, crush washer, and removable nut terminal, the RN5C is a dependable replacement choice for engines requiring a gasket-seat spark plug.\u003c\/p\u003e\n\u003cp data-start=\"1081\" data-end=\"1094\"\u003e\u003cstrong data-start=\"1081\" data-end=\"1094\"\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1096\" data-end=\"1551\"\u003e\n\u003cli data-section-id=\"35w7ye\" data-start=\"1096\" data-end=\"1160\"\u003e\n\u003cp data-start=\"1098\" data-end=\"1160\"\u003eCopper Plus design for dependable performance and durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"xb3q3g\" data-start=\"1161\" data-end=\"1195\"\u003e\n\u003cp data-start=\"1163\" data-end=\"1195\"\u003eOE-type replacement spark plug\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1xzx4ee\" data-start=\"1196\" data-end=\"1267\"\u003e\n\u003cp data-start=\"1198\" data-end=\"1267\"\u003eCopper core center electrode improves conductivity and heat control\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"112jjhr\" data-start=\"1268\" data-end=\"1321\"\u003e\n\u003cp data-start=\"1270\" data-end=\"1321\"\u003eResists fouling for reliable ignition performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1mrnc8c\" data-start=\"1322\" data-end=\"1382\"\u003e\n\u003cp data-start=\"1324\" data-end=\"1382\"\u003eCorrosion-resistant construction for longer service life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"w45g02\" data-start=\"1383\" data-end=\"1437\"\u003e\n\u003cp data-start=\"1385\" data-end=\"1437\"\u003eResistor design helps reduce ignition interference\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"d7rqmf\" data-start=\"1438\" data-end=\"1495\"\u003e\n\u003cp data-start=\"1440\" data-end=\"1495\"\u003eBuilt to ISO and SAE standards for proven performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1bfforn\" data-start=\"1496\" data-end=\"1551\"\u003e\n\u003cp data-start=\"1498\" data-end=\"1551\"\u003eFlat seat with crush washer for secure installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1553\" data-end=\"1580\"\u003e\u003cstrong data-start=\"1553\" data-end=\"1580\"\u003eProduct Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1582\" data-end=\"2451\"\u003e\n\u003cli data-section-id=\"qa9gza\" data-start=\"1582\" data-end=\"1602\"\u003e\n\u003cp data-start=\"1584\" data-end=\"1602\"\u003ePart number: 123\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"2ejh8u\" data-start=\"1603\" data-end=\"1622\"\u003e\n\u003cp data-start=\"1605\" data-end=\"1622\"\u003ePlug type: RN5C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"uv4fwr\" data-start=\"1623\" data-end=\"1676\"\u003e\n\u003cp data-start=\"1625\" data-end=\"1676\"\u003eClassification: Champion Copper Plus Small Engine\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"145hp0a\" data-start=\"1677\" data-end=\"1713\"\u003e\n\u003cp data-start=\"1679\" data-end=\"1713\"\u003eGrade type: Standard Replacement\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1daj57a\" data-start=\"1714\" data-end=\"1746\"\u003e\n\u003cp data-start=\"1716\" data-end=\"1746\"\u003ePart description: Spark Plug\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"k8m5f\" data-start=\"1747\" data-end=\"1788\"\u003e\n\u003cp data-start=\"1749\" data-end=\"1788\"\u003eCenter electrode tip material: Copper\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"3c37w7\" data-start=\"1789\" data-end=\"1826\"\u003e\n\u003cp data-start=\"1791\" data-end=\"1826\"\u003eCenter electrode design: Standard\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"oajh81\" data-start=\"1827\" data-end=\"1864\"\u003e\n\u003cp data-start=\"1829\" data-end=\"1864\"\u003eCenter electrode diameter: 0.1 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"j9r4wh\" data-start=\"1865\" data-end=\"1915\"\u003e\n\u003cp data-start=\"1867\" data-end=\"1915\"\u003eGround electrode material: Nickel copper alloy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"3au8g6\" data-start=\"1916\" data-end=\"1958\"\u003e\n\u003cp data-start=\"1918\" data-end=\"1958\"\u003eGround electrode core material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"17jmp0w\" data-start=\"1959\" data-end=\"2000\"\u003e\n\u003cp data-start=\"1961\" data-end=\"2000\"\u003eGround electrode tip material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"55pk7u\" data-start=\"2001\" data-end=\"2033\"\u003e\n\u003cp data-start=\"2003\" data-end=\"2033\"\u003eGround electrode quantity: 1\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1fj1r6e\" data-start=\"2034\" data-end=\"2070\"\u003e\n\u003cp data-start=\"2036\" data-end=\"2070\"\u003ePre-gap size: 0.025 in \/ 0.64 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"v0mjtd\" data-start=\"2071\" data-end=\"2105\"\u003e\n\u003cp data-start=\"2073\" data-end=\"2105\"\u003eHex size: 0.813 in \/ 20.650 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"163h8t2\" data-start=\"2106\" data-end=\"2125\"\u003e\n\u003cp data-start=\"2108\" data-end=\"2125\"\u003eSeat type: Flat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"palr3o\" data-start=\"2126\" data-end=\"2144\"\u003e\n\u003cp data-start=\"2128\" data-end=\"2144\"\u003eReach: 0.75 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1uo8p47\" data-start=\"2145\" data-end=\"2186\"\u003e\n\u003cp data-start=\"2147\" data-end=\"2186\"\u003eThread diameter: 0.551 in \/ 14.000 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"dujk1e\" data-start=\"2187\" data-end=\"2209\"\u003e\n\u003cp data-start=\"2189\" data-end=\"2209\"\u003eResistor type: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1gbvvjz\" data-start=\"2210\" data-end=\"2234\"\u003e\n\u003cp data-start=\"2212\" data-end=\"2234\"\u003eWasher included: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"udbmy7\" data-start=\"2235\" data-end=\"2257\"\u003e\n\u003cp data-start=\"2237\" data-end=\"2257\"\u003eWasher type: Crush\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"fdor8m\" data-start=\"2258\" data-end=\"2301\"\u003e\n\u003cp data-start=\"2260\" data-end=\"2301\"\u003eElectrical terminal type: Removable Nut\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"17h5lhz\" data-start=\"2302\" data-end=\"2332\"\u003e\n\u003cp data-start=\"2304\" data-end=\"2332\"\u003eManufacturer heat range: 5\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1nt2tzg\" data-start=\"2333\" data-end=\"2348\"\u003e\n\u003cp data-start=\"2335\" data-end=\"2348\"\u003eIndexed: No\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"18vjznu\" data-start=\"2349\" data-end=\"2366\"\u003e\n\u003cp data-start=\"2351\" data-end=\"2366\"\u003eHex type: Hex\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"qqgsz4\" data-start=\"2367\" data-end=\"2396\"\u003e\n\u003cp data-start=\"2369\" data-end=\"2396\"\u003eInstalled height: 2.24 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"6ll7eh\" data-start=\"2397\" data-end=\"2424\"\u003e\n\u003cp data-start=\"2399\" data-end=\"2424\"\u003eTaper diameter: 0.25 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"198zmx6\" data-start=\"2425\" data-end=\"2451\"\u003e\n\u003cp data-start=\"2427\" data-end=\"2451\"\u003eSubject to Prop 65: No\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2453\" data-end=\"2606\"\u003e\u003cstrong data-start=\"2453\" data-end=\"2465\"\u003eFitment:\u003c\/strong\u003e\u003cbr data-start=\"2465\" data-end=\"2468\"\u003eThe supplied application list shows broad fitment across many classic automotive and specialty applications, including select models from:\u003c\/p\u003e\n\u003cul data-start=\"2608\" data-end=\"3244\"\u003e\n\u003cli data-section-id=\"aepb75\" data-start=\"2608\" data-end=\"2717\"\u003e\n\u003cp data-start=\"2610\" data-end=\"2717\"\u003e\u003cstrong data-start=\"2610\" data-end=\"2624\"\u003eAlfa Romeo\u003c\/strong\u003e, \u003cstrong data-start=\"2626\" data-end=\"2636\"\u003eAllard\u003c\/strong\u003e, \u003cstrong data-start=\"2638\" data-end=\"2647\"\u003eAlvis\u003c\/strong\u003e, \u003cstrong data-start=\"2649\" data-end=\"2671\"\u003eArmstrong-Siddeley\u003c\/strong\u003e, \u003cstrong data-start=\"2673\" data-end=\"2686\"\u003eArnolt-MG\u003c\/strong\u003e, \u003cstrong data-start=\"2688\" data-end=\"2698\"\u003eAustin\u003c\/strong\u003e, \u003cstrong data-start=\"2700\" data-end=\"2717\"\u003eAustin Healey\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1avlduq\" data-start=\"2718\" data-end=\"2767\"\u003e\n\u003cp data-start=\"2720\" data-end=\"2767\"\u003e\u003cstrong data-start=\"2720\" data-end=\"2727\"\u003eBMW\u003c\/strong\u003e, \u003cstrong data-start=\"2729\" data-end=\"2740\"\u003eBentley\u003c\/strong\u003e, \u003cstrong data-start=\"2742\" data-end=\"2754\"\u003eBerkeley\u003c\/strong\u003e, \u003cstrong data-start=\"2756\" data-end=\"2767\"\u003eBugatti\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"493c34\" data-start=\"2768\" data-end=\"2783\"\u003e\n\u003cp data-start=\"2770\" data-end=\"2783\"\u003e\u003cstrong data-start=\"2770\" data-end=\"2783\"\u003eChevrolet\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"jgifdx\" data-start=\"2784\" data-end=\"2795\"\u003e\n\u003cp data-start=\"2786\" data-end=\"2795\"\u003e\u003cstrong data-start=\"2786\" data-end=\"2795\"\u003eDodge\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"8i8hbq\" data-start=\"2796\" data-end=\"2806\"\u003e\n\u003cp data-start=\"2798\" data-end=\"2806\"\u003e\u003cstrong data-start=\"2798\" data-end=\"2806\"\u003eElva\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1iiuyt1\" data-start=\"2807\" data-end=\"2818\"\u003e\n\u003cp data-start=\"2809\" data-end=\"2818\"\u003e\u003cstrong data-start=\"2809\" data-end=\"2818\"\u003eFargo\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"d9p669\" data-start=\"2819\" data-end=\"2828\"\u003e\n\u003cp data-start=\"2821\" data-end=\"2828\"\u003e\u003cstrong data-start=\"2821\" data-end=\"2828\"\u003eGMC\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"3lkb8y\" data-start=\"2829\" data-end=\"2877\"\u003e\n\u003cp data-start=\"2831\" data-end=\"2877\"\u003e\u003cstrong data-start=\"2831\" data-end=\"2841\"\u003eHealey\u003c\/strong\u003e, \u003cstrong data-start=\"2843\" data-end=\"2854\"\u003eHillman\u003c\/strong\u003e, \u003cstrong data-start=\"2856\" data-end=\"2865\"\u003eHonda\u003c\/strong\u003e, \u003cstrong data-start=\"2867\" data-end=\"2877\"\u003eHumber\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1tbut76\" data-start=\"2878\" data-end=\"2897\"\u003e\n\u003cp data-start=\"2880\" data-end=\"2897\"\u003e\u003cstrong data-start=\"2880\" data-end=\"2897\"\u003eInternational\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ldgxuf\" data-start=\"2898\" data-end=\"2922\"\u003e\n\u003cp data-start=\"2900\" data-end=\"2922\"\u003e\u003cstrong data-start=\"2900\" data-end=\"2910\"\u003eJaguar\u003c\/strong\u003e, \u003cstrong data-start=\"2912\" data-end=\"2922\"\u003eJensen\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"91w949\" data-start=\"2923\" data-end=\"2995\"\u003e\n\u003cp data-start=\"2925\" data-end=\"2995\"\u003e\u003cstrong data-start=\"2925\" data-end=\"2940\"\u003eLamborghini\u003c\/strong\u003e, \u003cstrong data-start=\"2942\" data-end=\"2956\"\u003eLanchester\u003c\/strong\u003e, \u003cstrong data-start=\"2958\" data-end=\"2968\"\u003eLancia\u003c\/strong\u003e, \u003cstrong data-start=\"2970\" data-end=\"2984\"\u003eLand Rover\u003c\/strong\u003e, \u003cstrong data-start=\"2986\" data-end=\"2995\"\u003eLotus\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"f1xy4u\" data-start=\"2996\" data-end=\"3046\"\u003e\n\u003cp data-start=\"2998\" data-end=\"3046\"\u003e\u003cstrong data-start=\"2998\" data-end=\"3004\"\u003eMG\u003c\/strong\u003e, \u003cstrong data-start=\"3006\" data-end=\"3022\"\u003eMetropolitan\u003c\/strong\u003e, \u003cstrong data-start=\"3024\" data-end=\"3034\"\u003eMorgan\u003c\/strong\u003e, \u003cstrong data-start=\"3036\" data-end=\"3046\"\u003eMorris\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1aboa78\" data-start=\"3047\" data-end=\"3068\"\u003e\n\u003cp data-start=\"3049\" data-end=\"3068\"\u003e\u003cstrong data-start=\"3049\" data-end=\"3056\"\u003eNSU\u003c\/strong\u003e, \u003cstrong data-start=\"3058\" data-end=\"3068\"\u003eNissan\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1719khk\" data-start=\"3069\" data-end=\"3082\"\u003e\n\u003cp data-start=\"3071\" data-end=\"3082\"\u003e\u003cstrong data-start=\"3071\" data-end=\"3082\"\u003ePorsche\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"5i4oxz\" data-start=\"3083\" data-end=\"3135\"\u003e\n\u003cp data-start=\"3085\" data-end=\"3135\"\u003e\u003cstrong data-start=\"3085\" data-end=\"3096\"\u003eRenault\u003c\/strong\u003e, \u003cstrong data-start=\"3098\" data-end=\"3107\"\u003eRiley\u003c\/strong\u003e, \u003cstrong data-start=\"3109\" data-end=\"3124\"\u003eRolls-Royce\u003c\/strong\u003e, \u003cstrong data-start=\"3126\" data-end=\"3135\"\u003eRover\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"142ooyc\" data-start=\"3136\" data-end=\"3175\"\u003e\n\u003cp data-start=\"3138\" data-end=\"3175\"\u003e\u003cstrong data-start=\"3138\" data-end=\"3148\"\u003eSinger\u003c\/strong\u003e, \u003cstrong data-start=\"3150\" data-end=\"3162\"\u003eStandard\u003c\/strong\u003e, \u003cstrong data-start=\"3164\" data-end=\"3175\"\u003eSunbeam\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"2tuxuj\" data-start=\"3176\" data-end=\"3198\"\u003e\n\u003cp data-start=\"3178\" data-end=\"3198\"\u003e\u003cstrong data-start=\"3178\" data-end=\"3185\"\u003eTVR\u003c\/strong\u003e, \u003cstrong data-start=\"3187\" data-end=\"3198\"\u003eTriumph\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"19m9yzk\" data-start=\"3199\" data-end=\"3229\"\u003e\n\u003cp data-start=\"3201\" data-end=\"3229\"\u003e\u003cstrong data-start=\"3201\" data-end=\"3213\"\u003eVauxhall\u003c\/strong\u003e, \u003cstrong data-start=\"3215\" data-end=\"3229\"\u003eVolkswagen\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"4tvooq\" data-start=\"3230\" data-end=\"3244\"\u003e\n\u003cp data-start=\"3232\" data-end=\"3244\"\u003e\u003cstrong data-start=\"3232\" data-end=\"3244\"\u003eWolseley\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHAMPION","offers":[{"title":"Default Title","offer_id":46280702722247,"sku":"ELE1937","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2026-03-11162510.png?v=1773271381","url":"https:\/\/mainstreeteshop.com\/products\/champion-copper-plus-spark-plug-rn5c-part-number-123","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}