{"product_id":"gsc-p-d-12-13-subaru-scion-brz-fr-s-21-4n-chrome-polished-intake-valve-36mm-head-1mm-set-8","title":"GSC P-D 12-13 Subaru\/Scion BRZ\/FR-S 21-4N Chrome Polished Intake Valve - 36mm Head (+1mm) - SET 8","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e2124-8\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eGSC Power-Division 2013-2021 Subaru BRZ \/ Scion FR-S \/ Toyota 86 21-4N Chrome Polished Intake Valves - 36mm Head (+1mm) - Set of 8\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eGSC Power-Division intake valves (2124-8) deliver precise engineering for the FA20 engine in 2013-2021 Subaru BRZ, Scion FR-S, and Toyota 86 models. This set of 8 features a 36mm head diameter (+1mm over stock) and 21-4N stainless steel construction with chrome polishing for reliable high-RPM performance. Expect improved airflow and heat management during aggressive driving or track use.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e36mm Head Diameter (+1mm):\u003c\/strong\u003e Provides greater airflow volume compared to stock 35mm valves to support higher boost and RPM levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e21-4N Stainless Steel:\u003c\/strong\u003e High-nickel content material resists fatigue and maintains shape under extreme valve train stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrome Polished Finish:\u003c\/strong\u003e Reduces friction on stem and fillets for less guide wear and better heat dissipation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5.965 Inch Overall Length:\u003c\/strong\u003e Exact OEM-matched dimensions ensure drop-in compatibility without valvetrain modifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwirl Polished Valve Head:\u003c\/strong\u003e Enhances flow efficiency across the intake port for measurable power gains.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned as a complete set of 8 for full intake valve replacement during rebuilds.\u003c\/li\u003e\n\u003cli\u003eInspect valve guides and seats prior to installation for optimal sealing.\u003c\/li\u003e\n\u003cli\u003eSpecial order item with standard ground 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\u003eRequires valve seat machining to accommodate +1mm head size.\u003c\/li\u003e\n\u003cli\u003eCompatible with stock retainers, springs, and keepers. measure clearances after install.\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\u003e2013-2021\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eBRZ\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013-2016\u003c\/td\u003e\n\u003ctd\u003eScion\u003c\/td\u003e\n\u003ctd\u003eFR-S\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017-2021\u003c\/td\u003e\n\u003ctd\u003eToyota\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003eAll\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 drag racing and endurance events with real-world testing data.\u003c\/li\u003e\n\u003cli\u003eMade in USA with tight tolerances for consistent performance.\u003c\/li\u003e\n\u003cli\u003eBacked by decades of valvetrain expertise for FA-series engines.\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 these valves fit 2022+ GR86 or BRZ models?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e No, these are for FA20 engines only. 2022+ models use FA24 requiring different part numbers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What makes 21-4N material different from standard stainless?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Higher nickel and controlled nitrogen improve heat resistance and prevent stem stretching at high temperatures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Is a warranty included?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e GSC offers a limited lifetime warranty against manufacturing defects when installed by certified professionals.\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 Standard ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e Special order - typically ships within 3-5 business days\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Securely boxed for protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.1 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":40341600239695,"sku":"GSC2124-8","price":169.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/Screenshot_2024-05-23_at_12.37.29_PM.png?v=1716482285","url":"https:\/\/www.blackopsautoworks.com\/products\/gsc-p-d-12-13-subaru-scion-brz-fr-s-21-4n-chrome-polished-intake-valve-36mm-head-1mm-set-8","provider":"Black Ops Auto Works","version":"1.0","type":"link"}