{"product_id":"acdelco-gm-original-equipment-copper-spark-plug-r42xls","title":"ACDelco GM Original Equipment Copper Spark Plug – R42XLS","description":"\u003cp data-start=\"149\" data-end=\"455\"\u003e\u003cstrong data-start=\"149\" data-end=\"165\"\u003eDescription:\u003c\/strong\u003e\u003cbr data-start=\"165\" data-end=\"168\"\u003eThe ACDelco R42XLS GM Original Equipment Conventional Spark Plug is engineered and validated by General Motors to deliver reliable ignition performance and efficient engine operation. Designed as an OE replacement, this spark plug meets rigorous GM standards for fit, form, and function.\u003c\/p\u003e\n\u003cp data-start=\"457\" data-end=\"859\"\u003eA copper core center electrode provides excellent heat transfer to help maintain optimal operating temperatures and maximize durability. The Black Onyx coating helps reduce corrosion, while the ribbed suppressor seal helps prevent spark flashover and misfires. Nickel-chrome alloy sheathing protects the center electrode from corrosion, supporting long service life and consistent ignition performance.\u003c\/p\u003e\n\u003cp data-start=\"861\" data-end=\"1070\"\u003eACDelco GM Original Equipment spark plugs are the same parts installed during vehicle production or validated by General Motors for GM vehicles, making them a dependable choice for maintenance and replacement.\u003c\/p\u003e\n\u003cp data-start=\"1072\" data-end=\"1085\"\u003e\u003cstrong data-start=\"1072\" data-end=\"1085\"\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1087\" data-end=\"1549\"\u003e\n\u003cli data-section-id=\"1qtyp6o\" data-start=\"1087\" data-end=\"1166\"\u003e\n\u003cp data-start=\"1089\" data-end=\"1166\"\u003eGM Original Equipment spark plug engineered and validated by General Motors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ks2lys\" data-start=\"1167\" data-end=\"1237\"\u003e\n\u003cp data-start=\"1169\" data-end=\"1237\"\u003eCopper core center electrode improves heat transfer and durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"vk1c98\" data-start=\"1238\" data-end=\"1283\"\u003e\n\u003cp data-start=\"1240\" data-end=\"1283\"\u003eBlack Onyx coating helps reduce corrosion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"13sra57\" data-start=\"1284\" data-end=\"1353\"\u003e\n\u003cp data-start=\"1286\" data-end=\"1353\"\u003eRibbed suppressor seal helps prevent spark flashover and misfires\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1jzm6s5\" data-start=\"1354\" data-end=\"1422\"\u003e\n\u003cp data-start=\"1356\" data-end=\"1422\"\u003eNickel-chrome alloy sheathing helps protect the center electrode\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1c4w6tl\" data-start=\"1423\" data-end=\"1490\"\u003e\n\u003cp data-start=\"1425\" data-end=\"1490\"\u003eDesigned for reliable ignition and efficient engine performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1uddwjb\" data-start=\"1491\" data-end=\"1549\"\u003e\n\u003cp data-start=\"1493\" data-end=\"1549\"\u003eSuitable for select automotive and marine applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1551\" data-end=\"1578\"\u003e\u003cstrong data-start=\"1551\" data-end=\"1578\"\u003eProduct Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1580\" data-end=\"2248\"\u003e\n\u003cli data-section-id=\"1xxtket\" data-start=\"1580\" data-end=\"1603\"\u003e\n\u003cp data-start=\"1582\" data-end=\"1603\"\u003ePart number: R42XLS\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1rbrkr1\" data-start=\"1604\" data-end=\"1651\"\u003e\n\u003cp data-start=\"1606\" data-end=\"1651\"\u003eProduct line: ACDelco GM Original Equipment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"x3vjbp\" data-start=\"1652\" data-end=\"1694\"\u003e\n\u003cp data-start=\"1654\" data-end=\"1694\"\u003eCenter electrode core material: Copper\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"paz3t5\" data-start=\"1695\" data-end=\"1742\"\u003e\n\u003cp data-start=\"1697\" data-end=\"1742\"\u003eCenter electrode tip material: Nickel alloy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"3c37w7\" data-start=\"1743\" data-end=\"1780\"\u003e\n\u003cp data-start=\"1745\" data-end=\"1780\"\u003eCenter electrode design: Standard\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"t9w8zf\" data-start=\"1781\" data-end=\"1825\"\u003e\n\u003cp data-start=\"1783\" data-end=\"1825\"\u003eGround electrode configuration: Standard\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"55pk7u\" data-start=\"1826\" data-end=\"1858\"\u003e\n\u003cp data-start=\"1828\" data-end=\"1858\"\u003eGround electrode quantity: 1\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"cdddk6\" data-start=\"1859\" data-end=\"1895\"\u003e\n\u003cp data-start=\"1861\" data-end=\"1895\"\u003eThread diameter: 14 mm (0.55 in)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"163h8t2\" data-start=\"1896\" data-end=\"1915\"\u003e\n\u003cp data-start=\"1898\" data-end=\"1915\"\u003eSeat type: Flat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"zv682e\" data-start=\"1916\" data-end=\"1945\"\u003e\n\u003cp data-start=\"1918\" data-end=\"1945\"\u003eReach: 0.75 in (19.05 mm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ynv09y\" data-start=\"1946\" data-end=\"1979\"\u003e\n\u003cp data-start=\"1948\" data-end=\"1979\"\u003eHex size: 13\/16 in (20.62 mm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"dujk1e\" data-start=\"1980\" data-end=\"2002\"\u003e\n\u003cp data-start=\"1982\" data-end=\"2002\"\u003eResistor type: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"gvfwq0\" data-start=\"2003\" data-end=\"2038\"\u003e\n\u003cp data-start=\"2005\" data-end=\"2038\"\u003ePre-gap size: 0.04 in (0.89 mm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"17h5h8w\" data-start=\"2039\" data-end=\"2069\"\u003e\n\u003cp data-start=\"2041\" data-end=\"2069\"\u003eManufacturer heat range: 2\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1vddt5q\" data-start=\"2070\" data-end=\"2099\"\u003e\n\u003cp data-start=\"2072\" data-end=\"2099\"\u003eInsulator material: ES703\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"14xvsr6\" data-start=\"2100\" data-end=\"2140\"\u003e\n\u003cp data-start=\"2102\" data-end=\"2140\"\u003eInsulator height: 2.22 in (56.49 mm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"wl0n4l\" data-start=\"2141\" data-end=\"2170\"\u003e\n\u003cp data-start=\"2143\" data-end=\"2170\"\u003eWasher type: Crush washer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1gbvvjz\" data-start=\"2171\" data-end=\"2195\"\u003e\n\u003cp data-start=\"2173\" data-end=\"2195\"\u003eWasher included: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"xksijm\" data-start=\"2196\" data-end=\"2219\"\u003e\n\u003cp data-start=\"2198\" data-end=\"2219\"\u003ePackage quantity: 1\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACDelco","offers":[{"title":"Default Title","offer_id":46271993249991,"sku":"ELE1849","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2026-03-09164308.png?v=1773099679","url":"https:\/\/mainstreeteshop.com\/products\/acdelco-gm-original-equipment-copper-spark-plug-r42xls","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}