IAG Stage 5 CNC Ported Heads w/ +1mm Ferrea Valves & GSC S3 Cams for 18-20 STI N25 Casting. 2012-subaru-wrx-sti GTIN: 00887753780164

GTIN: 00887753780164

precision-formed louvers direct oil downwards and help to prevent oil that is draining from the cylinder heads in the lower crankcase area from sloshing upwards into the path of the crankshaft and connecting rods

DBA's 4000 Series XS rotors feature our best technology & materials for maximum performance

Dimension: 36 x 19 x 5 inches

Exhaust Valve Diameter: 33

IAG Stage 5 CNC Ported Heads w/ +1mm Ferrea Valves & GSC S3 Cams for 18-20 STI N25 Casting. 2012-subaru-wrx-sti GTIN: 00887753780164IAG'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 Subaru's. The ported head package starts with brand new N25 OEM WRX STI 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