IAG Stage 4 CNC Ported Heads w/ +1mm GSC Valves for 02-05 WRX 2.0L S20 w/ Chamber Matching(Cams / Lifters Sold Separately). 2020-subaru-wrx sti-sti The modified case halves are

The modified case halves are then measured and assembled using a new FA20 WRX / BRZ Subaru crankshaft that is matched to King main bearings

) Multiple Times stiffer and stronger than the stock case Precision machined for a superior surface finish Hard anodized to avoid marking or straining Additional Options: Bore & Hone: Bore & Hone to customer specification $300-$350 Fire-Lock machine the deck surface $200 Case Bolts: ARP Case Bolts Head Studs: IAG / ARP 14mm Head Studs

IAG Magnum Subaru EJ25 Closed Deck Short Block The IAG Magnum Short Block starts with brand new Subaru 2

IAG-Spec H-Beam connecting rods and ARP rod bolts are utilized along with ACL or King race rod bearings

Our test cars serve as daily drivers

IAG Stage 4 CNC Ported Heads w/ +1mm GSC Valves for 02-05 WRX 2.0L S20 w/ Chamber Matching(Cams / Lifters Sold Separately). 2020-subaru-wrx sti-sti The modified case halves areIAG Stage 4 CNC Ported Heads with +1mm GSC Valves: IAG's Stage 4 Cylinder Head Package utilizes a CNC porting program for the WRX STI 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 WRX OEM 2. 0L S20 head castings directly from Subaru of America. The bare castings are visually inspected then fixtured into our in house Centroid 5 axis CNC Machine,