IAG Performance Stage 3 Extreme Fa20 Subaru Closed Deck Short Block (12.5:1 Compression Ratio) (2013-2020 FR-S, BRZ, 86) - IAG-ENG-1324
IAG Stage 3 Extreme FA20 Closed Deck Short Block The IAG Stage 3 Extreme short block starts with new Subaru FA 2.0L BRZ engine case halves that are machined for improved oiling. Then IAG machines the case halves assembled together in our Haas VF-4SS CNC mill to accept the IAG CLOSED Deck Inserts that transform the block into a solid deck. The unique inserts feature small passages that allow needed coolant flow to the deck surface. The case halves are then CNC machined with O-ring receiver grooves around the bore surface as well as drilled and tapped to accept 1/2" head studs that greatly reduce head gasket failure during high cylinder pressure scenarios. Next, the short block is Deck Plate bored and honed that to 86.25mm on our in-house Sunnen SV-30 the most advanced automotive cylinder hone available. IAG's in-house honing process is able to set piston to wall clearances tighter for a quieter running engine. The modified case halves are then measured and assembled using a new FA20 WRX / BRZ Subaru crankshaft that is matched to King main bearings. Manley I-Beam rods with ARP2000 rod bolts are utilized along with King or ACL rod bearings. The case halves are sealed with new OEM case bolts and sealant. Finally, standard compression IAG-Spec 86.25mm 12.5:1 compression ratio forged pistons are spec'd and installed along with an OEM oil plug finishing off the short block.
The Stage 3 Extreme Short Block has a power output rating of 800BHP; All IAG Short Blocks are balanced and blueprinted; Compression Ratio: 12.5:1 (Standard Compression) on standard gasket thickness.
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.