{"product_id":"hks-super-fire-racing-m40-spark-plug","title":"HKS Super Fire Racing M40 Spark Plug","description":"Important Note: All HKS Spark Plugs Are Sold Individually - Please Purchase The Amount Needed For Your Car.\n\u003cbr\u003e\n\u003cbr\u003eJIS Type\n\u003cbr\u003e\n\u003cbr\u003eThread Size: 14×19mm\n\u003cbr\u003e\n\u003cbr\u003eWrench Size: 16mm\n\u003cbr\u003e\n\u003cbr\u003eHeat Range: NGK #8\n\u003cbr\u003e\n\u003cbr\u003eUltimate spark plug \"\"M\"\".\n\u003cbr\u003e\n\u003cbr\u003eIgnitionability, durability, anti-insulation all reinforced. HKS has made the best plug for both tuning engines and stock engines.\n\u003cbr\u003e\n\u003cbr\u003eFeatures\n\u003cbr\u003e\n\u003cbr\u003e0.6mm Iridium Alloy Center Electrode\n\u003cbr\u003e\n\u003cbr\u003eIridium Alloy Center Electrode reduces voltage requirement as well as improving ignition performance and durability.\n\u003cbr\u003e\n\u003cbr\u003eOuter Electrode with Platinum Chip\n\u003cbr\u003e\n\u003cbr\u003eThe Outer Electrode incorporates a square platinum chip which improves durability, and when combined with the iridium center electrode boosts ignition performance. The Outer Electrode features a shortened tip design and tapered shape while maintaining the necessary space for proper ignition.\n\u003cbr\u003e\n\u003cbr\u003eShort Type Outer Electrode (Anti-Vibration)\n\u003cbr\u003e\n\u003cbr\u003eThe outer electrode has been shortened and engineered with the ideal shape to decrease weight for resistance against vibration. This anti-vibration design improves longevity of the outer electrode.\n\u003cbr\u003e\n\u003cbr\u003eThermal Edge\n\u003cbr\u003e\n\u003cbr\u003eAfter long idling or various combustion conditions carbon buildup can occur causing misfires. The Thermal Edge of the ceramic insulator will discharge to help decrease carbon deposits.\n\u003cbr\u003e\n\u003cbr\u003eSpark Support Gap\n\u003cbr\u003e\n\u003cbr\u003eDischarges will occur in the Spark Support Gap (space between the tip of insulator and the base of the outer electrode) to help prevent carbon buildup.\n\u003cbr\u003e\n\u003cbr\u003ePerformance and Efficiency\n\u003cbr\u003e\n\u003cbr\u003eIncreased Ignition Performance\n\u003cbr\u003eDecreased voltage requirement strengthens ignition performance under harsh conditions like lean mixture or high boost pressure.\n\u003cbr\u003e\n\u003cbr\u003eImproved Durability\n\u003cbr\u003eNew material and design improves durability, which allows for use under hard combustion conditions like continuous high load during circuit driving or aggressive tuning.\n\u003cbr\u003e* Improper combustion condition and wrong heat range selection might cause damage to the spark plug.\n\u003cbr\u003e\n\u003cbr\u003eDecreased Carbon Deposits\n\u003cbr\u003eThermal Edge and Spark Support Gap help prevent carbon buildup for better ignition under various combustion conditions.\n\u003cbr\u003e\n\u003cbr\u003eSpecial Design RE-type for Rotary Engines\n\u003cbr\u003e\n\u003cbr\u003eRotary engines reciprocating design have a different mechanism and combustion condition. RE-type spark plugs are specially designed to meet the different requirement for rotary engines. The straight shape platinum outer electrode enables reliable ignition performance.\n\u003cbr\u003e\n\u003cbr\u003eHeat Range Conversion Chart\n\u003cbr\u003e\n\u003cbr\u003eHKS\n\u003cbr\u003e\n\u003cbr\u003e25\n\u003cbr\u003e\n\u003cbr\u003e30\n\u003cbr\u003e\n\u003cbr\u003e35\n\u003cbr\u003e\n\u003cbr\u003e40\n\u003cbr\u003e\n\u003cbr\u003e45\n\u003cbr\u003e\n\u003cbr\u003e50\n\u003cbr\u003e\n\u003cbr\u003e52.5\n\u003cbr\u003e\n\u003cbr\u003e55\n\u003cbr\u003e\n\u003cbr\u003eDENSO\n\u003cbr\u003e\n\u003cbr\u003e16\n\u003cbr\u003e\n\u003cbr\u003e20\n\u003cbr\u003e\n\u003cbr\u003e22\n\u003cbr\u003e\n\u003cbr\u003e24\n\u003cbr\u003e\n\u003cbr\u003e27\n\u003cbr\u003e\n\u003cbr\u003e31\n\u003cbr\u003e\n\u003cbr\u003e32\n\u003cbr\u003e\n\u003cbr\u003e34\n\u003cbr\u003e\n\u003cbr\u003eNGK\n\u003cbr\u003e\n\u003cbr\u003e5\n\u003cbr\u003e\n\u003cbr\u003e6\n\u003cbr\u003e\n\u003cbr\u003e7\n\u003cbr\u003e\n\u003cbr\u003e8\n\u003cbr\u003e\n\u003cbr\u003e9\n\u003cbr\u003e\n\u003cbr\u003e10\n\u003cbr\u003e\n\u003cbr\u003e10.5\n\u003cbr\u003e\n\u003cbr\u003e11\n\u003cbr\u003e\n\u003cbr\u003e* Above information is the reference for heat resistance.","brand":"HKS","offers":[{"title":"Default Title","offer_id":48684678644008,"sku":"50003-M40","price":22.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/5767\/7352\/files\/hks-super-fire-racing-m40-spark-plug-plugs-coilpacks-leads-670.webp?v=1750183207","url":"https:\/\/www.tegiwa.com\/products\/hks-super-fire-racing-m40-spark-plug","provider":"Tegiwa","version":"1.0","type":"link"}