{"product_id":"hks-super-fire-racing-m40","title":"HKS SUPER FIRE RACING M40","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e50003-M40\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 4957266720219\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eHKS Super Fire Racing M40 Spark Plug 2002-2021 Subaru Impreza WRX STI Legacy GT Forester XT\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eHKS Super Fire Racing M40 is a high-performance iridium spark plug designed for racing and tuned applications. It fits 2002-2021 Subaru Impreza WRX STI Legacy GT Forester XT models with EJ20 EJ25 engines. Expect stronger ignition sparks for better combustion higher horsepower throttle response and extended plug life under boost.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.7mm Pure Iridium Center Electrode:\u003c\/strong\u003e Produces focused spark for consistent ignition in high-rpm boosted conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eU-Groove Platinum Ground Electrode:\u003c\/strong\u003e Enhances flame kernel growth reduces misfires increases combustion efficiency\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTaper-Cut Ground Electrode Arm:\u003c\/strong\u003e Minimizes quenching improves ignitability supports higher power output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Heat-Resistant Ceramic Insulator:\u003c\/strong\u003e Handles extreme temperatures from turbocharged racing use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCopper Core Center Shaft:\u003c\/strong\u003e Provides rapid heat dissipation prevents pre-ignition in tuned engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSold as individual plug gap preset to 0.032 inches adjust for specific engine tune\u003c\/li\u003e\n\u003cli\u003eUse in high-boost or modified engines replace every 20k miles for peak performance\u003c\/li\u003e\n\u003cli\u003eSecure OEM-style packaging protects threads during shipping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eTorque to 18-22 ft-lbs anti-seize on threads\u003c\/li\u003e\n\u003cli\u003eCompatible with OEM coil packs no special hardware needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2004-2021\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX STI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2002-2007\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008-2014\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2005-2009\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eLegacy\u003c\/td\u003e\n\u003ctd\u003e2.5 GT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2004-2013\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eForester\u003c\/td\u003e\n\u003ctd\u003eXT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015-2021\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eWRX\u003c\/td\u003e\n\u003ctd\u003eSTI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose HKS?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMotorsport heritage from Japanese tuning leader\u003c\/li\u003e\n\u003cli\u003eRacing-proven design tested in Super GT D1GP\u003c\/li\u003e\n\u003cli\u003ePrecision manufacturing with advanced materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\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 Does HKS Super Fire Racing M40 fit my 2008 Subaru STI EJ257?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes direct replacement for stock plugs in all EJ25 turbo models 2004-2021 STI improves spark under 20+ psi boost\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What materials are used in this spark plug?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e 0.7mm pure iridium center electrode platinum-tipped ground electrode high-alumina ceramic insulator for durability\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What is the warranty and gap spec?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e 1-year defect warranty preset gap 0.032 inches verify with tune check every 5k miles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS Ground or USPS Priority\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 HKS branded box 4 x 2 x 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2 oz\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HKS","offers":[{"title":"Default Title","offer_id":43793480613967,"sku":"HKS50003-M40","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/hks-super-fire-racing-m40-hks.jpg?v=1767417818","url":"https:\/\/www.blackopsautoworks.com\/products\/hks-super-fire-racing-m40","provider":"Black Ops Auto Works","version":"1.0","type":"link"}