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. 0

Specifications

What's Included

  • (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:
  • GSC S2 Camshafts
  • (x16) OEM Lifter Buckets
  • Bench Valve Lash Service (Final Lash Should be Checked and Adjusted Once Heads are Installed)

Compatibility

  • 2008-2014 Subaru Impreza WRX STI
  • 2011-2014 Subaru Impreza WRX STI Limited
  • 2010 Subaru Impreza WRX STI Special Edition
  • 2012-2016 Subaru WRX STI
  • 2013-2018 Subaru WRX STI Base
  • 2015 Subaru WRX STI Launch Edition
  • 2015-2018 Subaru WRX STI Limited
  • 2018 Subaru WRX STI STI
  • 2016 Subaru WRX STI Series.HyperBlue
  • 2017-2018 Subaru WRX STI Sport
  • 2013-2018 Subaru WRX STI Sport-tech
  • 2014 Subaru WRX STI Tsurugi Edition
  • 2018 Subaru WRX STI Type RA

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. 0

  • (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:
  • GSC S2 Camshafts
  • (x16) OEM Lifter Buckets
  • Bench Valve Lash Service (Final Lash Should be Checked and Adjusted Once Heads are Installed)
  • 2008-2014 Subaru Impreza WRX STI
  • 2011-2014 Subaru Impreza WRX STI Limited
  • 2010 Subaru Impreza WRX STI Special Edition
  • 2012-2016 Subaru WRX STI
  • 2013-2018 Subaru WRX STI Base
  • 2015 Subaru WRX STI Launch Edition
  • 2015-2018 Subaru WRX STI Limited
  • 2018 Subaru WRX STI STI
  • 2016 Subaru WRX STI Series.HyperBlue
  • 2017-2018 Subaru WRX STI Sport
  • 2013-2018 Subaru WRX STI Sport-tech
  • 2014 Subaru WRX STI Tsurugi Edition
  • 2018 Subaru WRX STI Type RA

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