{"product_id":"autolite-copper-spark-plug-666","title":"Autolite Copper Spark Plug – 666","description":"\u003cp data-start=\"111\" data-end=\"423\"\u003e\u003cstrong data-start=\"111\" data-end=\"127\"\u003eDescription:\u003c\/strong\u003e\u003cbr data-start=\"127\" data-end=\"130\"\u003eThe Autolite 666 Copper Spark Plug is engineered to deliver reliable ignition performance, quick starts, and consistent engine power. Its copper core center electrode provides excellent thermal conductivity, helping maintain proper operating temperatures while improving resistance to fouling.\u003c\/p\u003e\n\u003cp data-start=\"425\" data-end=\"843\"\u003eDesigned with high nickel alloy center and ground electrodes, this spark plug provides enhanced durability and long service life. The high alumina multi-rib ceramic insulator supports strong electrical insulation and efficient heat dissipation, helping maintain stable combustion performance. A corrosion-resistant nickel-plated shell helps protect the spark plug from rust and wear for dependable operation over time.\u003c\/p\u003e\n\u003cp data-start=\"845\" data-end=\"1023\"\u003eAutolite copper spark plugs are designed to meet performance expectations across a wide range of gasoline engines, making them a reliable choice for everyday vehicle maintenance.\u003c\/p\u003e\n\u003cp data-start=\"1025\" data-end=\"1038\"\u003e\u003cstrong data-start=\"1025\" data-end=\"1038\"\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1040\" data-end=\"1423\"\u003e\n\u003cli data-section-id=\"50w2va\" data-start=\"1040\" data-end=\"1118\"\u003e\n\u003cp data-start=\"1042\" data-end=\"1118\"\u003eCopper core center electrode improves heat transfer and fouling resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"z3yar7\" data-start=\"1119\" data-end=\"1197\"\u003e\n\u003cp data-start=\"1121\" data-end=\"1197\"\u003eHigh nickel alloy center and ground electrodes provide extended durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"25h33z\" data-start=\"1198\" data-end=\"1281\"\u003e\n\u003cp data-start=\"1200\" data-end=\"1281\"\u003eMulti-rib ceramic insulator enhances electrical insulation and heat dissipation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"l00fff\" data-start=\"1282\" data-end=\"1355\"\u003e\n\u003cp data-start=\"1284\" data-end=\"1355\"\u003eNickel-plated shell helps resist corrosion and extend spark plug life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1wunvln\" data-start=\"1356\" data-end=\"1423\"\u003e\n\u003cp data-start=\"1358\" data-end=\"1423\"\u003eEngineered for quick starts and consistent ignition performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1425\" data-end=\"1452\"\u003e\u003cstrong data-start=\"1425\" data-end=\"1452\"\u003eProduct Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1454\" data-end=\"2166\"\u003e\n\u003cli data-section-id=\"q448ts\" data-start=\"1454\" data-end=\"1474\"\u003e\n\u003cp data-start=\"1456\" data-end=\"1474\"\u003ePart number: 666\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"t1nkhe\" data-start=\"1475\" data-end=\"1494\"\u003e\n\u003cp data-start=\"1477\" data-end=\"1494\"\u003eBrand: Autolite\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9pckcv\" data-start=\"1495\" data-end=\"1530\"\u003e\n\u003cp data-start=\"1497\" data-end=\"1530\"\u003eProduct type: Copper spark plug\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"x3vjbp\" data-start=\"1531\" data-end=\"1573\"\u003e\n\u003cp data-start=\"1533\" data-end=\"1573\"\u003eCenter electrode core material: Copper\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"13xlloe\" data-start=\"1574\" data-end=\"1615\"\u003e\n\u003cp data-start=\"1576\" data-end=\"1615\"\u003eCenter electrode tip material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"3au8g6\" data-start=\"1616\" data-end=\"1658\"\u003e\n\u003cp data-start=\"1618\" data-end=\"1658\"\u003eGround electrode core material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"17jmp0w\" data-start=\"1659\" data-end=\"1700\"\u003e\n\u003cp data-start=\"1661\" data-end=\"1700\"\u003eGround electrode tip material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ibjk3h\" data-start=\"1701\" data-end=\"1733\"\u003e\n\u003cp data-start=\"1703\" data-end=\"1733\"\u003eGround configuration: Single\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"55pk7u\" data-start=\"1734\" data-end=\"1766\"\u003e\n\u003cp data-start=\"1736\" data-end=\"1766\"\u003eGround electrode quantity: 1\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"r5af6m\" data-start=\"1767\" data-end=\"1793\"\u003e\n\u003cp data-start=\"1769\" data-end=\"1793\"\u003eThread diameter: 14 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1vqolju\" data-start=\"1794\" data-end=\"1816\"\u003e\n\u003cp data-start=\"1796\" data-end=\"1816\"\u003eSeat type: Tapered\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"rfiaup\" data-start=\"1817\" data-end=\"1840\"\u003e\n\u003cp data-start=\"1819\" data-end=\"1840\"\u003eWasher included: No\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"u1agss\" data-start=\"1841\" data-end=\"1860\"\u003e\n\u003cp data-start=\"1843\" data-end=\"1860\"\u003eReach: 10.95 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"5tphr9\" data-start=\"1861\" data-end=\"1880\"\u003e\n\u003cp data-start=\"1863\" data-end=\"1880\"\u003eHex size: 16 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"dujk1e\" data-start=\"1881\" data-end=\"1903\"\u003e\n\u003cp data-start=\"1883\" data-end=\"1903\"\u003eResistor type: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"gwnm18\" data-start=\"1904\" data-end=\"1929\"\u003e\n\u003cp data-start=\"1906\" data-end=\"1929\"\u003eResistance: 4000 ohms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"4rw0r8\" data-start=\"1930\" data-end=\"1955\"\u003e\n\u003cp data-start=\"1932\" data-end=\"1955\"\u003ePre-gap size: 0.06 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"17h5jth\" data-start=\"1956\" data-end=\"1986\"\u003e\n\u003cp data-start=\"1958\" data-end=\"1986\"\u003eManufacturer heat range: 7\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"sjdq26\" data-start=\"1987\" data-end=\"2018\"\u003e\n\u003cp data-start=\"1989\" data-end=\"2018\"\u003eInsulator material: Ceramic\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"3c37w7\" data-start=\"2019\" data-end=\"2056\"\u003e\n\u003cp data-start=\"2021\" data-end=\"2056\"\u003eCenter electrode design: Standard\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"11yt6xq\" data-start=\"2057\" data-end=\"2104\"\u003e\n\u003cp data-start=\"2059\" data-end=\"2104\"\u003eCenter electrode projection: Mid projection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1b7wdfo\" data-start=\"2105\" data-end=\"2152\"\u003e\n\u003cp data-start=\"2107\" data-end=\"2152\"\u003eElectrical terminal type: Non-removable nut\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1p7i06c\" data-start=\"2153\" data-end=\"2166\"\u003e\n\u003cp data-start=\"2155\" data-end=\"2166\"\u003eSkirt: No\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AUTOLITE","offers":[{"title":"Default Title","offer_id":46275754164423,"sku":"ELE1901","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2026-03-10151751_b947a5e0-be04-4dac-8d93-be1e184c2419.png?v=1773186687","url":"https:\/\/mainstreeteshop.com\/products\/autolite-copper-spark-plug-666","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}