IAG Stage 5 CNC Ported Heads w/ +1mm Ferrea Valves for 18-20 STI N25 Casting (Cams / Lifters Sold Separately). 2010-subaru-impreza-wrx limited SB9-XTG6 kit features an Xtreme

SB9-XTG6 kit features an Xtreme pressure plate for the most demanding driver

The oil drain plug uses an OEM style crush washer

ACT 1994 Subaru Impreza 6 Pad Rigid Race Disc

ACT 2006 Subaru Impreza XT-M/Race Sprung 6 Pad Clutch Kit

The IAG Stage 2 pocket ported head package starts with brand new WRX STI OEM V25 head castings

IAG Stage 5 CNC Ported Heads w/ +1mm Ferrea Valves for 18-20 STI N25 Casting (Cams / Lifters Sold Separately). 2010-subaru-impreza-wrx limited SB9-XTG6 kit features an XtremeIAG's Stage 5 Cylinder Head Package utilizes a CNC porting program for the N25 heads that was developed over the past five years and tested on the most successful high horsepower Subarus. The ported head package starts with brand new N25 2008 17 STI OEM head castings directly from Subaru of America. The bare castings are visually inspected then fixtured into our in house Centroid 5 axis CNC Machine, one of the most advanced precision engine machining