IAG Performance IAG 750 CNC Pocket Ported S20 Comp Heads - Combustion Mod, No Cams/Lifters IAG-ENG-H750SCE

The IAG 750 CNC Pocket Ported Competition Cylinder Heads are designed with the weekend racer in mind. These heads work great for cars with some race track duty (road, rally, auto-x, drag) and are designed to support up to 750 BHP with supporting mods. These heads include upgraded GSC Standard Size Valves, GSC Viton Valve Stem Seals, IAG Stage 1 Valve Springs with Titanium Retainers, and OEM Keepers. GSC S1 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 750 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 S1 Camshafts and OEM Lifter Buckets for valve adjustment. The bare castings are visually inspected and then fixtured into our in-house Centroid 5-axis CNC Machine. The Centroid CNC ports the intake and exhaust runners under the valves and blends them to the valve seat. Once the Centroid completes the port process, the heads undergo a cam clearance machining process which removes material from the lifter area where larger lift and duration cam profiles are known to contact the castings. The heads are then fixtured in our Newen Valve Guide and Seat Machine to cut all intake and exhaust seats with a multi-angle valve job that suits the flow characteristics of GSC's standard size valves. At this point, the heads' decks are resurfaced using our TS-3000 BlockMate, which cuts the aluminum to a smooth, even finish. Next, the heads are ultrasonically cleaned to remove debris and oils from the machining process. Finally, the heads are reassembled using IAG Stage 1 Single Valve Springs and Titanium Retainers along with GSC Viton stem seals.

This Part Fits:

Year	Make	Model	Submodel	Notes
2002	Subaru	Impreza	WRX
2003	Subaru	Impreza	WRX
2004	Subaru	Impreza	WRX
2005	Subaru	Impreza	WRX

Specifications:

Description_SHO	750 Cylinder Head
Description_INV	IAG 750 Comp Cylinder Head Package
Description_ASC	IAG 750 CNC Pocket Ported Competition Cylinder Head Package Includes: (x2) Brand New Subaru OEM Cylinder Head Castings, (x8) GSC 36mm (Standard) Intake Valves, (x8) GSC 32mm (Standard) Exhaust Valves, (x16) IAG Stage 1 Single Valve Springs & Titanium Retainers, (x16) GSC Valve Guides, (x16) GSC Valve Stem Seals, IAG Performance CNC Pocket Porting, Multi-Angle Valve Job, Drilled for 1/2" or 14mm Head Studs, Machined Cam Lobe Clearance, Resurface, Ultrasonic Cleaning
Description_ASC	For use with stock cams or mild duration cams.
Description_ASC	Assembly and professional installation recommended.
Description_ASC	Workmanship/parts warranty will only be available for professionally installed cylinder heads.
Description_KSW	IAG Performance
Description_LAB	750 CNC Pocket Ported S20 Comp Cylinder Head Pkg w/ Com Mod (No Cams / Lifters)
Description_DES	IAG 750 CNC Pocket Ported S20 Comp Heads - Combustion Mod, No Cams/Lifters
Description_APS	Subaru: Impreza 02 - 05 WRX
Description_EXT	IAG 750 CNC Pocket Ported S20 Competition Cylinder Heads Package w/ Combustion Mod, (No Cams / Lifters) for 02-05 WRX
Description_MKT	The IAG 750 CNC Pocket Ported Competition Cylinder Heads are designed with the weekend racer in mind. These heads work great for cars with some race track duty (road, rally, auto-x, drag) and are designed to support up to 750 BHP with supporting mods. These heads include upgraded GSC Standard Size Valves, GSC Viton Valve Stem Seals, IAG Stage 1 Valve Springs with Titanium Retainers, and OEM Keepers. GSC S1 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 750 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 S1 Camshafts and OEM Lifter Buckets for valve adjustment. The bare castings are visually inspected and then fixtured into our in-house Centroid 5-axis CNC Machine. The Centroid CNC ports the intake and exhaust runners under the valves and blends them to the valve seat. Once the Centroid completes the port process, the heads undergo a cam clearance machining process which removes material from the lifter area where larger lift and duration cam profiles are known to contact the castings. The heads are then fixtured in our Newen Valve Guide and Seat Machine to cut all intake and exhaust seats with a multi-angle valve job that suits the flow characteristics of GSC's standard size valves. At this point, the heads' decks are resurfaced using our TS-3000 BlockMate, which cuts the aluminum to a smooth, even finish. Next, the heads are ultrasonically cleaned to remove debris and oils from the machining process. Finally, the heads are reassembled using IAG Stage 1 Single Valve Springs and Titanium Retainers along with GSC Viton stem seals.
Description_FAB	New Head Castings with Upgraded GSC Standard Size Valves, IAG Stage 1 Valve Springs with Titanium Retainers
Description_FAB	Power: The IAG 750 Cylinder Head Package has a power output rating of 750 BHP.
Description_TLE	IAG Performance 750 CNC Pocket Ported S20 Competition Cylinder Heads Package with Combustion Mod, (No Cams / Lifters) for 02-05 WRX
Description_DEF	Engine Cylinder Head Set