{"product_id":"iag-950-cnc-ported-race-n25-cylinder-heads-package-no-cams-lifters-for-18-19-sti-type-ra-2019-21-sti","title":"IAG 950 CNC Ported Race N25 Cylinder Heads Package (No Cams \u0026 Lifters) For 18-19 STI Type RA 2019-21 STI","description":"The IAG 950 CNC Ported Race Cylinder Heads are designed for racing and competition. These fully CNC ported heads provide a significant upgrade in flow over the IAG 750 heads. These heads work great for cars where getting more power might be the difference between winning or losing that big race. The IAG 950 heads work great for drag racing, as well as high horsepower time attack or hill climb, and are designed to support up to 950 BHP with supporting mods. These heads include upgraded GSC +1MM Superalloy Valves, GSC Viton Valve Stem Seals, Upgraded GSC Valve Guides, IAG-Spec Beehive Valve Springs with Titanium Retainers, and OEM Keepers. GSC S2 Camshafts are available with OEM valve lifter buckets. We also offer an optional chamber modification service (see below) for EJ20 heads to allow use on EJ25 short blocks. Each IAG 950 Cylinder Head Set starts with new OEM castings from Subaru of America. The first step is to select your Year and Model of vehicle so that we may provide you with the right castings to fit your project. Next, you'll select whether or not you want to include our optional GSC camshaft package. If selected, these heads will include new GSC S2 Camshafts and OEM Lifter Buckets for valve adjustment.\r\n\u003cul\u003e\t\u003cli\u003eNew Head Castings with Upgraded GSC +1MM Superalloy Valves, IAG Beehive Valve Springs\u003c\/li\u003e\r\n\t\u003cli\u003ePower: The IAG 950 Cylinder Head Package has a power output rating of 950 BHP.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cb\u003eVehicle Specific\u003c\/b\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eSubaru: WRX STI 18 - 21 Base \/ Kanrai Edition \/ Limited \/ S209 \/ STI \/ Sport \/ Sport-tech \/ Type RA\u003c\/li\u003e\r\n\r\n\u003c\/ul\u003e\r\n\u003ch3\u003eAttributes:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eBrand Name: \u003c\/b\u003eIAG Performance\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eGTIN: \u003c\/b\u003e00887753904492\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAssembled: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCNC-Machined Combustion Chamber: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCNC-Machined Exhaust Runner: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCNC-Machined Intake Runner: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCylinder Head Gasket Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Valve Diameter: \u003c\/b\u003e33\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Valve Length: \u003c\/b\u003e104.25\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Valve Material: \u003c\/b\u003eStainless Steel\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Valve Stem Diameter: \u003c\/b\u003e6\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eGrade Type: \u003c\/b\u003ePerformance\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Valve Diameter: \u003c\/b\u003e37\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Valve Length: \u003c\/b\u003e104\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Valve Material: \u003c\/b\u003eStainless Steel\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Valve Stem Diameter: \u003c\/b\u003e6\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eLength: \u003c\/b\u003e20\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eMaterial: \u003c\/b\u003eAluminum\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eMounting Hardware Included: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003ePower Rating: \u003c\/b\u003e950 BHP\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Covers Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Seal Material: \u003c\/b\u003eViton\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Seals Included: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Spring Retainer Material: \u003c\/b\u003eTitanium\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Spring Retainers Included: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Springs Included: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValves Included: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWeight: \u003c\/b\u003e72\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWidth: \u003c\/b\u003e16\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003eExtended Information:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eCountry of Origin: \u003c\/b\u003eUS\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eEmissions : \u003c\/b\u003eEmissions Compliance Exempt\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eLife Cycle Status: \u003c\/b\u003eAvailable To Order\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003ePacking Information:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eQuantity of Each: \u003c\/b\u003e1\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003ePackage UOM: \u003c\/b\u003eEA\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eDimension: \u003c\/b\u003e20 x 16 x 12 inches\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWeight: \u003c\/b\u003e40 POUNDS\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003ePDF:\u003c\/h3\u003e\r\n\u003cp\u003e\r\n\u003c\/p\u003e\u003cdiv\u003e\u003ca href=\"https:\/\/sdda.semadata.org\/Standard\/IAG%20Performance\/IAG%20Break%20In-INSTRUCTIONS.pdf\" target=\"_blank\"\u003e\u003cimg 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style=\"display:inline\"\u003e \u003c\/a\u003e\u003c\/div\u003e\r\n\r\n\u003cdiv id=\"sema-product-fitment\" class=\"product__accordion accordion fitment\"\u003e\u003c\/div\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":47104026673375,"sku":"JGJS-IAG-ENG-H950NE","price":4999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0528\/7972\/0636\/files\/IAG-ENG-H950NE-01.jpg?v=1751549866","url":"https:\/\/felixperformance.com\/products\/iag-950-cnc-ported-race-n25-cylinder-heads-package-no-cams-lifters-for-18-19-sti-type-ra-2019-21-sti","provider":"FelixPerformance","version":"1.0","type":"link"}