Details
IAG Performance Stage 5 Cnc Ported Heads W/Cm W/ +1Mm Ferrea Valves &Amp; Gsc S3 Camss20 Casting (2002-2005 Impreza WRX, 9-2X Aero) - IAG-ENG-3055SCS3
IAG's Stage 5 Cylinder Head Package utilizes a CNC porting program for the S20 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 S20 OEM WRX head castings directly from Subaru. The bare castings are inspected then fixtured into our state of the art Centroid 5-axis CNC Machine. The Centroid CNC ports the intake and hard to reach exhaust "dog-leg" port runner. CNC porting is not only an efficient way of machining the heads it also offers consistent port results every time. Next, the heads receive our combustion chamber modification in which the shape of the chambers are machined to match those of an STI head. Once the Centroid completes this process the heads undergo a cam clearance process to remove material from the lifter area where large duration cam profiles are known to contact the castings. The heads are then drilled to fit larger 1/2" or 14mm head studs for maximum clamping force. Next, the OEM guides are removed and replaced in favor of Ferrea Copper / Bronze valve guides that offer greater heat dissipation, lubricity properties and are shaped to improve flow. Once all the new intake and exhaust guides are in place they are diamond-honed in our honing station. Next our Serdi 3.0 Valve Guide and Seat Machine cuts all intake and exhaust seats with multi-angle valve job that suits the flow characteristics of Ferrea Comp Plus +1mm valves. At this point, the heads decks are resurfaced using our TS-3000 BlockMate that cuts the aluminum to a smooth even finish. Next, the heads are ultrasonically cleaned to remove debris and oils from the machining process. The heads are then reassembled using GSC Billet S3 camshafts designed for drag racing applications intending to make 700+ wheel horsepower. 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 spec.
New Head Castings, Fully CNC Ported with +1mm Ferrea Valves, Ferrea Drag Springs, GSC S3 Cams
IAG (Integrity Auto Group) was established in 2004, initially selling high quality used performance cars. Within a year and a half, IAG sold over 200 Subaru WRX / STI?s. Our clients began requesting us to provide performance products and services for their Subaru?s, which we quickly catered to. IAG extended these services and parts nationally by 2007. Fast forward to 2021, IAG Performance is known as a leader in the automotive performance industry (specifically Subaru) and carries an impeccable reputation among our clients and peers.
