IAG Stage 2 Pocket Ported Cylinder Heads for 08-17 STI W25 Casting (Cams / Lifters Sold Separately). 2021-subaru-wrx sti-base (EJ20 requires dipstick modifications)

(EJ20 requires dipstick modifications)

GTIN: 00887753777737

Dimension: 4 x 0

The IAG MAF (Mass Air Flow Sensor) mounting flange is manufactured from aluminum and is designed to be welded onto a custom 3" aluminum pipe

bottom end location) Unique 4 bolt bottom end strengthening Threads are rolled into the block rather than conventionally cut for much greater strength Full cooling system operation Radiused coolant and oil galleries for improved flow and less foaming/turbulence Fits all factory engine bay ancillaries (i

IAG Stage 2 Pocket Ported Cylinder Heads for 08-17 STI W25 Casting (Cams / Lifters Sold Separately). 2021-subaru-wrx sti-base (EJ20 requires dipstick modifications)IAG Stage 2 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,