Stage 3 Pocket Ported Heads w/+1mm GSC Valves S20 Casting(Cams/Lifters Sold Sep) 2013-subaru-impreza-wrx sti The IAG Race Series Engine

The IAG Race Series Engine Mounts are designed as solid mounts with racing in mind

the heads are reassembled using GSC Billet S2 camshafts intended for vehicles making 500+ wheel horsepower

Protect the underside of your engine from rocks and debris both on-road and off

GSC Valves

During the final assembly

Stage 3 Pocket Ported Heads w/+1mm GSC Valves S20 Casting(Cams/Lifters Sold Sep) 2013-subaru-impreza-wrx sti The IAG Race Series EngineIAG 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 OEM S20 head castings,