IAG Stage 3 Pocket Ported Heads w/ +1mm GSC Valves & GSC S2 Cams for 18-20 STI N25 Casting. 2010-subaru-impreza-wrx sti All sold separately)

SKU: 1694461015

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IAG Stage 3 Pocket Ported Heads w/ +1mm GSC Valves & GSC S2 Cams for 18-20 STI N25 Casting. 2010-subaru-impreza-wrx sti All sold separately)IAG 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 N25 head castings,

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