{"product_id":"gsc-p-d-subaru-ej205-ej207-ej257-ej257b-exhaust-valve-guide-stopper-style-001in-od-single","title":"GSC P-D Subaru EJ205\/EJ207\/EJ257\/EJ257B Exhaust Valve Guide Stopper Style +.001in OD - Single","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e3025.001-1\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eGSC Subaru 2002-2021 WRX STI EJ205 EJ207 EJ257 EJ257B Exhaust Valve Guide Stopper Style +.001in OD - Single\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eUpgrade your Subaru EJ engine with the GSC Power-Division exhaust valve guide in stopper style and +0.001in OD. This single guide fits EJ205 EJ207 EJ257 and EJ257B cylinder heads found in WRX and STI models from 2002-2021. It delivers reliable sealing and durability for turbocharged performance applications.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStopper Style Design:\u003c\/strong\u003e Built-in lip seats guide at exact height to avoid over-insertion and maintain valve stem alignment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e+0.001in OD Sizing:\u003c\/strong\u003e Oversized outer diameter fits guide bores with minor wear for restored precision without full reaming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManganese Bronze Material:\u003c\/strong\u003e High-strength alloy resists heat and wear in exhaust ports under boost pressure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust-Specific Engineering:\u003c\/strong\u003e Optimized shape and tolerances improve sealing and flow for better power output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision CNC Machining:\u003c\/strong\u003e Ensures micron-level accuracy for drop-in compatibility and long-term valvetrain stability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSold as single guide, order quantity needed for full cylinder head rebuild\u003c\/li\u003e\n\u003cli\u003eInspect cylinder head guide bores for wear before installation\u003c\/li\u003e\n\u003cli\u003eSecurely packaged in protective tube for damage-free delivery\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\u003eHone guide bores to 0.376in diameter to match +0.001in OD\u003c\/li\u003e\n\u003cli\u003eCompatible with stock or aftermarket valves, lash caps, and retainers\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\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\u003e2004-2021\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza WRX\u003c\/td\u003e\n\u003ctd\u003eSTI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2001-2007\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza WRX STI\u003c\/td\u003e\n\u003ctd\u003eJDM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2004-2009\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eLegacy\u003c\/td\u003e\n\u003ctd\u003eGT Spec B\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 WRX\u003c\/td\u003e\n\u003ctd\u003eHatchback STI\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 STI\u003c\/td\u003e\n\u003ctd\u003eSedan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose GSC Power-Division?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProven in professional racing Subaru builds worldwide\u003c\/li\u003e\n\u003cli\u003eHigh-volume production with strict quality controls\u003c\/li\u003e\n\u003cli\u003eEngineered for extreme boost and RPM demands\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 Will this fit 2004-2021 USDM STI EJ257 heads?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes, direct fit for EJ257 and EJ257B exhaust positions in STI models from 2004-2021\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What material is used for the guide?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Manganese bronze for superior heat resistance and low friction on exhaust valve stems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Is machining required for installation?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Bore honing to 0.376in recommended for optimal press fit, professional shop advised\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 Protective plastic tube, 4in x 2in x 1in box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":41006782021711,"sku":"GSC3025.001-1","price":6.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/products\/220338487a1b4b5142128ca09c4a0695.jpg?v=1717523029","url":"https:\/\/www.blackopsautoworks.com\/products\/gsc-p-d-subaru-ej205-ej207-ej257-ej257b-exhaust-valve-guide-stopper-style-001in-od-single","provider":"Black Ops Auto Works","version":"1.0","type":"link"}