{"product_id":"ngk-spark-plug-6637-04-2-bpr6eix","title":"NGK Spark Plug - #6637\/04 — Indian Motorcycle Chief, Scout, Spirit (1999-2003)","description":"\u003cp\u003eNGK spark plug #6637\/04 is a genuine replacement for V-twin motorcycles, including Harley-Davidson and Indian models. Built to OEM ignition specifications for reliable cold starts and consistent combustion across the RPM range.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eGenuine NGK manufacturing\u003c\/li\u003e\n  \u003cli\u003eV-twin motorcycle fitment\u003c\/li\u003e\n  \u003cli\u003eCross-compatible with ILKR8Q7 and BPR8ES variants\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e NGK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 6637\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 087295166376\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 3.2 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 1 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 0.7 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Japan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits V-twin motorcycles, including Harley-Davidson and Indian Motorcycle models.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat motorcycles does this plug fit?\u003c\/h3\u003e\n\u003cp\u003eNGK #6637\/04 fits most V-twin motorcycle engines, including Harley-Davidson and Indian models. Verify your owner's manual before ordering.\u003c\/p\u003e\n\u003ch3\u003eCan I use ILKR8Q7 or BPR8ES instead?\u003c\/h3\u003e\n\u003cp\u003eYes — ILKR8Q7 can substitute for ILKR8Q, and BPR8ES can substitute for BPR8ES-S. Cross-reference your original part number first.\u003c\/p\u003e\n\u003ch3\u003eHow often should I replace this spark plug?\u003c\/h3\u003e\n\u003cp\u003eFollow your motorcycle's service schedule, typically every 10,000–20,000 miles depending on riding conditions and engine design.\u003c\/p\u003e\n\u003ch3\u003eIs this an OEM part?\u003c\/h3\u003e\n\u003cp\u003eThis is a genuine NGK replacement plug built to OEM ignition specifications, not an aftermarket copy.\u003c\/p\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":53035011833967,"sku":"2-BPR6EIX","price":47000.0,"currency_code":"COP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_82cec6be-814e-43e7-8b22-01f52f23886f.png?v=1779559125","url":"https:\/\/vtwinbikers.com\/en-co\/products\/ngk-spark-plug-6637-04-2-bpr6eix","provider":"Vtwinbikers","version":"1.0","type":"link"}