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IAG Performance IAG 950 CNC Ported Race W25 Cylinder Head - GSC S2 Cam & Kelford Bucket Lifters IAG-ENG-H950WL
$8,123.99
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 Kelford DLC Coated 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 Kelford DLC Coated valve lifter buckets for valve adjustment. To get the most out of these heads you'll want to select the GSC Power-Division billet S2 camshafts for your IAG 950 Head Package. These cams are built to suit the higher horsepower these heads will support. With a power range of 500 WHP and up, you need some additional supporting mods to utilize the true potential of the S2s. Our IAG 950 Short Block, an upgraded turbocharger and fuel system, and a quality engine management system are key. Along with the camshafts we'll include all new OEM valve lifter buckets and set bench lash using our specially designed fixture.
This Part Fits:
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2008 | Subaru | Impreza | WRX STI | |
| 2009 | Subaru | Impreza | WRX STI | |
| 2010 | Subaru | Impreza | WRX STI | |
| 2011 | Subaru | Impreza | WRX STI | |
| 2012 | Subaru | Impreza | WRX STI | |
| 2013 | Subaru | Impreza | WRX STI | |
| 2014 | Subaru | Impreza | WRX STI | |
| 2011 | Subaru | Impreza | WRX STI Limited | |
| 2012 | Subaru | Impreza | WRX STI Limited | |
| 2013 | Subaru | Impreza | WRX STI Limited | |
| 2014 | Subaru | Impreza | WRX STI Limited | |
| 2010 | Subaru | Impreza | WRX STI Special Edition | |
| 2012 | Subaru | WRX | STI | |
| 2013 | Subaru | WRX | STI | |
| 2014 | Subaru | WRX | STI | |
| 2015 | Subaru | WRX | STI | |
| 2016 | Subaru | WRX | STI | |
| 2013 | Subaru | WRX STI | Base | |
| 2014 | Subaru | WRX STI | Base | |
| 2015 | Subaru | WRX STI | Base | |
| 2016 | Subaru | WRX STI | Base | |
| 2017 | Subaru | WRX STI | Base | |
| 2018 | Subaru | WRX STI | Base | |
| 2015 | Subaru | WRX STI | Launch Edition | |
| 2015 | Subaru | WRX STI | Limited | |
| 2016 | Subaru | WRX STI | Limited | |
| 2017 | Subaru | WRX STI | Limited | |
| 2018 | Subaru | WRX STI | Limited | |
| 2016 | Subaru | WRX STI | Series.HyperBlue | |
| 2017 | Subaru | WRX STI | Sport | |
| 2018 | Subaru | WRX STI | Sport | |
| 2018 | Subaru | WRX STI | STI | |
| 2014 | Subaru | WRX STI | Tsurugi Edition | |
| 2018 | Subaru | WRX STI | Type RA |
Specifications:
| Prop 65 - Short Label | WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov |
| Prop 65 (C, R or CR) | CR |
| Prop 65 Yes/No | Yes |
| Title | IAG 950 CNC Ported Race W25 Cylinder Heads Package w/ GSC S2 Cam & Kelford Bucket Lifters for 08-18 STI |
| Power Rating | 950 BHP |
| 306 | Yes |
| 10271 | Yes |
| 10582 | No |
| 10267 | Yes |
| 10266 | Yes |
| 6629 | 33 |
| 9795 | 104.25 |
| 9956 | Stainless Steel |
| 10249 | 6 |
| 3390 | Performance |
| 6628 | 37 |
| 9794 | 104 |
| 9797 | Stainless Steel |
| 10248 | 6 |
| 14 | 20 |
| 10 | Aluminum |
| 30 | Yes |
| 10364 | No |
| 10269 | Viton |
| 8789 | Yes |
| 9798 | Titanium |
| 10024 | Yes |
| 8788 | Yes |
| 9799 | Yes |
| 627 | 72 |
| 24 | 16 |
| Description_SHO | 950 Cylinder Head |
| Description_INV | IAG 950 CNC Ported Race Cylinder Head |
| Description_ASC | IAG 950 CNC Ported Race Cylinder Heads Package Includes: (x2) Brand New Subaru OEM Cylinder Head Castings, (x8) GSC 37mm (+1mm) Intake Valves, (x8) GSC 33mm (+1mm) SuperAlloy Exhaust Valves, (x16) IAG-Spec Beehive Springs & Retainers, (x16) GSC Manganese-Bronze Valve Guides, (x16) GSC Valve Stem Seals, IAG Performance CNC Porting, Multi-Angle Valve Job, Drilling for compatibility with ½" or 14mm Head Studs, Machined Cam Lobe Clearance, Resurface, Ultrasonic Cleaning. Optional Camshaft Package Also Includes: GSC S2 Camshafts, (x16) Kelford DLC Coated Lifter Buckets, Bench Valve Lash Service (Final Lash Should be Checked and Adjusted Once Heads are Installed) |
| Description_ASC | For use with larger cams such as GSC S2. |
| Description_ASC | Assembly and professional installation recommended. |
| Description_ASC | Workmanship/parts warranty will only be available for professionally installed cylinder heads. |
| Description_KSW | IAG-ENG-H950W, IAG-ENG-3040W, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Description_KSW | 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, ej25 |
| Description_KSW | w25, n25, impreza, heads, forester, legacy, gt, xt, casting wrx, sti, |
| Description_LAB | 950 CNC Ported Race W25 Cylinder Head Package w/ GSC S2 Cam & Kelford Lifters |
| Description_DES | IAG 950 CNC Ported Race W25 Cylinder Head - GSC S2 Cam & Kelford Bucket Lifters |
| Description_APS | Subaru: Impreza 08 - 14 WRX STI / WRX STI Limited / WRX STI Special Edition |
| Description_EXT | IAG 950 CNC Ported Race W25 Cylinder Head - GSC S2 Cam & Kelford Bucket Lifters for 08-18 STI |
| Description_MKT | 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 Kelford DLC Coated 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 Kelford DLC Coated valve lifter buckets for valve adjustment. To get the most out of these heads you'll want to select the GSC Power-Division billet S2 camshafts for your IAG 950 Head Package. These cams are built to suit the higher horsepower these heads will support. With a power range of 500 WHP and up, you need some additional supporting mods to utilize the true potential of the S2s. Our IAG 950 Short Block, an upgraded turbocharger and fuel system, and a quality engine management system are key. Along with the camshafts we'll include all new OEM valve lifter buckets and set bench lash using our specially designed fixture. |
| Description_FAB | New Head Castings with Upgraded GSC +1MM Superalloy Valves, IAG Beehive Valve Springs |
| Description_FAB | Power: The IAG 950 Cylinder Head Package has a power output rating of 950 BHP. |
| Description_TLE | IAG Performance 950 CNC Ported Race W25 Cylinder Heads Package with GSC S2 Cam & Kelford Bucket Lifters for 08-18 STI |
| Description_DEF | Engine Cylinder Head Set |