IAG Stage 3 Pocket Ported Heads w/ +1mm GSC Valves & GSC S2 Cams for 08-17 STI W25 Casting. 2010-subaru-impreza-wrx New Head Castings with Standard

New Head Castings with Standard Sized GSC Valves

CNC porting offers consistent port results every time

All components included are BRAND NEW and there is NEVER A CORE CHARGE required

The IAG RockBlocker smoked tail light overlay film kit is made from a high impact resistant film with an adhesive backing

IAG Stage 3 Pocket Ported Heads w/ +1mm GSC Valves & GSC S2 Cams for 08-17 STI W25 Casting. 2010-subaru-impreza-wrx New Head Castings with StandardIAG Stage 3 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 W25 head castings,