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IAG Stage 3 Extreme FA20 DIT Subaru Closed Deck Short Block for 2015-18 WRX


IAG Stage 3 Extreme FA20 DIT Subaru Closed Deck Short Block for 2015-18 WRX

  • Weight: 0 lb
  • Dimensions: N/A
  • Installation Difficulty:
SKU: IAG-ENG-1313 Categories: , ,


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 2015-18 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. Stage 3 Extreme FA20 Includes: Case Halves – Converted to Closed Deck using brand new Subaru OEM case halves Case Machining – Modified for improved oiling Case Machining – Bored and honed to 86.25mm O-Ringing – Machine and O-Ring Deck Surface Head Studs – Machine Case to 1/2″ head studs – * Head studs are sold separately Pistons – IAG-Spec 86.25mm Forged Pistons Ring Set and .150″ x 2.250″ Chromoly Wrist Pins. Connecting Rods – Manley I-Beam / ARP2000 Rod Bolts Rod – ACL or King XPG Main Bearings – King XPG Crankshaft – New Subaru FA20 DIT WRX crankshaft Case / Main Bolts – Standard Subaru case bolts Hardware – OEM Oil Plug – comes preinstalled at the oil pan location Additional Options Available: Oil Plugs & Rear Main Seal – (x1) 11021AA190 Plug (x2) 11024AA141 Plugs (x1) 806792010 Rear Main Seal – (PN# IAG-ENG-1721) Head Studs – IAG Performance 1/2″ head stud set manufactured by ARP – (PN# IAG-ENG-1700) Compression Ratio: 10.0:1 (.6 lower than stock compression) on standard gasket thickness. Power: The IAG Stage 3 Extreme Short Block has a power output rating of 800BHP *All IAG Short Blocks are balanced and blueprinted.

Make Model Submodel Year
Subaru WRX 2015 - 2018
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