IAG Stage 3 Pocket Ported Heads w/ +1mm GSC Valves & GSC S2 Cams for 08-17 STI W25 Casting. 2010-subaru-impreza-wrx breather discharge hose

SKU: 897387925

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IAG Stage 3 Pocket Ported Heads w/ +1mm GSC Valves & GSC S2 Cams for 08-17 STI W25 Casting. 2010-subaru-impreza-wrx breather discharge hoseIAG 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,

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