IAG Performance IAG-ENG-1313 IAG Stage 3 Extreme FA20 DIT Subaru Closed Deck Short Block for 2015-21 WRX.

IAG Stage 3 Extreme FA20 DIT Closed Deck Short Block The IAG Stage 3 Extreme short block starts with new Subaru FA 2.0L 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 short block is measured and assembled using a new 2015-20 Subaru 2.0L WRX 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, IAG-Spec 86.25mm forged pistons are spec'd and installed along with an OEM oil plug finishing off the short block.

This Part Fits:

Year	Make	Model	Submodel	Notes
2014	Subaru	Forester
2015	Subaru	Forester
2016	Subaru	Forester
2017	Subaru	Forester
2018	Subaru	Forester
2015	Subaru	WRX
2016	Subaru	WRX
2017	Subaru	WRX
2018	Subaru	WRX
2019	Subaru	WRX
2020	Subaru	WRX
2021	Subaru	WRX