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IAG Stage 4 Cylinder Head Package w/ Combustion Chamber Mod Includes GSC S2 Camshafts
Subaru WRX 2002-2005
Features & Product Details
RallySport Direct now carries highly sought-after high-performance upgrades and accessories brought to you by IAG Performance.
This is the IAG Performance Stage 4 CNC Ported Heads With +1MM GSC Valves And GSC Billet S2 Camshafts With Combustion Chamber Mod.
These heads utilize a CNC porting program for the S20 heads that have been developed over the past 5 years, and they have been tested on the most successful high-horsepower Subarus. These begin as brand new S20 head castings directly from Subaru Of America, where they are visually inspected and then fixtures at IAG's in-house Centroid 5-axis CNC machine which is considered to be of the most advanced piece of precision engine machining equipment available worldwide.
COMBUSTION CHAMBER MODIFICATION
COMPONENTS AND MACHINING PROCESS
GSC BILLET S2 CAMSHAFT FEATURES:
Note: Workmanship/parts warranty will only be available for professionally installed cylinder heads