{"product_id":"hks-super-fire-racing-mr45hlz-single","title":"HKS Super Fire Racing MR45HLZ - Single","description":"\u003cdiv\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e50003-MR45HLZ-1\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan itemprop=\"sku\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003ch4\u003e\u003cstrong\u003eHKS Super Fire Racing Spark Plug – Single Plug MR45HLZ-1\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003eHKS 50003-MR45HLZ-1\u003c\/strong\u003e Super Fire Racing Spark Plug is a high-performance iridium spark plug designed for maximum ignition efficiency and durability in high-boost, high-RPM, or tuned engines. Featuring a 0.6mm ultra-fine iridium center electrode and a platinum ground electrode, this plug delivers superior ignitability, faster flame kernel growth, and better combustion under extreme conditions. The heat range MR45 (comparable to NGK 8-9) is optimized for naturally aspirated or mildly boosted applications, while the special insulator and electrode design resist pre-ignition and fouling. Sold individually, the Super Fire Racing plug is ideal for Honda, Nissan, Mitsubishi, Subaru, and other performance vehicles seeking improved throttle response, smoother idle, and higher power potential. Perfect for street, track, or drift builds where reliable ignition is critical.\u003c\/p\u003e\n\u003ch4\u003eKey Features \u0026amp; Benefits\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e0.6mm Iridium Center Electrode – Ultra-fine tip for superior ignitability and spark focus\u003c\/li\u003e\n\u003cli\u003ePlatinum Ground Electrode – Enhanced durability and consistent performance under high heat\u003c\/li\u003e\n\u003cli\u003eHeat Range MR45 – Balanced for naturally aspirated or mild boost; resists pre-ignition\u003c\/li\u003e\n\u003cli\u003eSpecial Insulator Design – Improves thermal conductivity and reduces fouling\u003c\/li\u003e\n\u003cli\u003eHKS Engineering – Japanese precision for maximum combustion efficiency and power\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable width=\"100%\" cellspacing=\"0\" cellpadding=\"8\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e50003-MR45HLZ-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHKS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Diameter\u003c\/td\u003e\n\u003ctd\u003eM14 x 1.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReach\u003c\/td\u003e\n\u003ctd\u003e26.5mm (long reach)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHex Size\u003c\/td\u003e\n\u003ctd\u003e16mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Range\u003c\/td\u003e\n\u003ctd\u003eMR45 (equivalent to NGK 8-9)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrode\u003c\/td\u003e\n\u003ctd\u003e0.6mm iridium center \/ platinum ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGap\u003c\/td\u003e\n\u003ctd\u003ePre-gapped (confirm with engine specs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSingle plug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhats Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOne HKS Super Fire Racing spark plug (MR45HLZ-1)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSingle plug – order quantity needed for full set (typically 6 for most 4-cyl, 8 for V8)\u003c\/li\u003e\n\u003cli\u003eOptimized for high-RPM, boosted, or tuned engines – excellent ignitability\u003c\/li\u003e\n\u003cli\u003eResists fouling and pre-ignition under high boost or aggressive timing\u003c\/li\u003e\n\u003cli\u003eCompatible with stock or aftermarket ignition coils\u003c\/li\u003e\n\u003cli\u003eHKS Japanese leader in performance ignition and engine components\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEstimated time: 30-60 minutes (full set)\u003c\/li\u003e\n\u003cli\u003eRemove old spark plugs, clean threads\u003c\/li\u003e\n\u003cli\u003eInstall HKS Super Fire plugs with anti-seize (if recommended), torque to spec (typically 18-22 ft-lbs)\u003c\/li\u003e\n\u003cli\u003eCheck gap if adjusting (pre-gapped from factory)\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended for high-performance builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"8\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUniversal (MR45 heat range)\u003c\/td\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eM14 x 1.25 thread, 26.5mm reach – confirm engine specs and heat range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhy Choose HKS Super Fire Racing Spark Plugs?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eUltra-fine iridium electrode for superior ignitability and combustion efficiency\u003c\/li\u003e\n\u003cli\u003eHigh heat range tolerance for boosted or high-RPM applications\u003c\/li\u003e\n\u003cli\u003eReduced fouling and longer life compared to stock plugs\u003c\/li\u003e\n\u003cli\u003eHKS legendary Japanese brand for ignition and engine performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Is this plug for a specific engine? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e MR45 heat range suits many naturally aspirated or mildly boosted engines; confirm with engine builder.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e How many plugs do I need? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One per cylinder order quantity needed for your engine (e.g., 4, 6, 8).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need to regap them? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Pre-gapped from factory; adjust only if engine builder recommends specific gap.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eShipping and Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS \/ FedEx Ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock – ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Secure protective packaging\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approx. 0.5-1 lb (single plug)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HKS","offers":[{"title":"Default Title","offer_id":44637640032335,"sku":"HKS50003-MR45HLZ-1","price":33.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/HKS_Super_Fire_Racing_Spark_Plug_Single.png?v=1773083856","url":"https:\/\/www.blackopsautoworks.com\/products\/hks-super-fire-racing-mr45hlz-single","provider":"Black Ops Auto Works","version":"1.0","type":"link"}