IAG Stage 2 Pocket Ported Cylinder Heads for 07 STI V25 Casting (Cams / Lifters Sold Separately). 2016-subaru-wrx sti-limited Full cooling system operation

Full cooling system operation

In the Centroid

This is a common practice on many street vehicles as well as race cars that utilize a rotated turbo system

Unique Fire Rings help contain extreme cylinder pressures

The IAG 900 package is ideal for clients looking for an engine package to support up to 900 BHP

IAG Stage 2 Pocket Ported Cylinder Heads for 07 STI V25 Casting (Cams / Lifters Sold Separately). 2016-subaru-wrx sti-limited Full cooling system operationIAG Stage 2 Pocket Port Cylinder Head Package: The head package centers around our popular CNC pocket porting program which was developed over the last several years. Pocket porting removes excess OEM casting flash and the material underneath the valves. By smoothing and blending this area under the valve seat, significant flow capability can be achieved. The IAG Stage 2 pocket ported head package starts with brand new WRX STI OEM V25 head castings,