IAG Stage 3 Pocket Ported Heads w/ +1mm GSC Valves for 08-17 STI W25 Casting (Cams / Lifters Sold Separately). 2011-subaru-impreza-wrx the cams are matched to

the cams are matched to Ferrea Dual Valve Springs and Titanium Retainers along with Ferrea valve stem seals then bench-lashed to a tolerance that is close to final specifications

Prothane 08-10 Subaru WRX Total Kit - Red

GTIN: 00887753779069

IAG's in-house honing process is able to set custom piston to wall clearances to best fit your needs

Each package starts with brand new WRX STI N25 OEM head castings

IAG Stage 3 Pocket Ported Heads w/ +1mm GSC Valves for 08-17 STI W25 Casting (Cams / Lifters Sold Separately). 2011-subaru-impreza-wrx the cams are matched toIAG 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 3 pocket ported head package starts with brand new WRX STI OEM W25 head castings,