{"product_id":"gsc-p-d-toyota-supra-bmw-z4-b58-bmw-m3-m4-s58-chrome-polished-28-5mm-head-exhaust-valve-single","title":"GSC P-D Toyota Supra\/BMW Z4 B58 \/ BMW M3\/M4 S58 Chrome Polished 28.5mm Head Exhaust Valve - Single","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e2091-01\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e GSC2091-01\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eGSC P-D 2020-2024 Toyota Supra B58 \/ 2020-2024 BMW Z4 B58 \/ 2021-2024 BMW M3 M4 S58 Chrome Polished 28.5mm Head Exhaust Valve - Single\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eGSC Power-Division single chrome polished 28.5mm head exhaust valve fits Toyota Supra B58 engines and BMW Z4 B58 plus M3 M4 S58 platforms. Direct OEM replacement delivers better heat resistance and exhaust flow for turbocharged builds. Perfect for cylinder head work in high boost or high RPM setups pushing 1000+ hp.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrome Polished Stem:\u003c\/strong\u003e 6.38mm diameter cuts friction on guides and withstands exhaust temps to 1600°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e28.5mm Head Diameter:\u003c\/strong\u003e OEM exact with +1.00mm dish and 7.70mm thickness for drop-in fit and full exhaust flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne-Piece Forged Construction:\u003c\/strong\u003e High-temp alloy forging holds up to 40+ psi boost without fatigue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBead Blasted Head:\u003c\/strong\u003e Finish boosts airflow velocity and scavenging in B58 S58 heads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium Filled Design:\u003c\/strong\u003e Sodium inside speeds heat transfer from head to stem for cooler running and extended durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSold individually order six for a complete engine set\u003c\/li\u003e\n\u003cli\u003eValve length 112.30mm ensures exact installed height\u003c\/li\u003e\n\u003cli\u003ePackaged in protective sleeve to avoid shipping damage\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\u003eCheck valve stem clearance and lap seats for tight seal\u003c\/li\u003e\n\u003cli\u003eWorks with OEM or GSC valve springs 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\u003e2020-2024\u003c\/td\u003e\n\u003ctd\u003eToyota\u003c\/td\u003e\n\u003ctd\u003eSupra\u003c\/td\u003e\n\u003ctd\u003e3.0L Turbo B58\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2020-2024\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eZ4\u003c\/td\u003e\n\u003ctd\u003esDrive30i M40i B58\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021-2024\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003eBase Competition S58\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021-2024\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003eBase Competition S58\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\u003e20+ years building valvetrain parts for drag racing and road course victories\u003c\/li\u003e\n\u003cli\u003eMachined to micron levels for dependable power in 1000+hp B58 S58 engines\u003c\/li\u003e\n\u003cli\u003eProven through real-world testing on engines around the globe\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 valve fit both B58 and S58 engines?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes identical head and stem dimensions make it a direct fit for all B58 and S58 cylinder heads in listed models\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What alloy and finish are used?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Forged 21-4N or Inconel-equivalent heat-resistant alloy with swirl polished chrome stem plating for wear protection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What warranty applies and is DIY install possible?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e 1-year unlimited mileage warranty against breakage professional install advised to ensure proper seating and lash\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 sleeve inside 8 x 3 x 1 inch box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.15 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":43540293976143,"sku":"GSC2091-01","price":36.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/gsc-p-d-toyota-suprabmw-z4-b58-bmw-m3m4-s58-chrome-polished-28_5mm-head-exhaust-valve-single-gsc-power-division.png?v=1767411745","url":"https:\/\/www.blackopsautoworks.com\/products\/gsc-p-d-toyota-supra-bmw-z4-b58-bmw-m3-m4-s58-chrome-polished-28-5mm-head-exhaust-valve-single","provider":"Black Ops Auto Works","version":"1.0","type":"link"}