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LIVE INVENTORY DISABLED: DELAYS FROM GLOBAL SUPPLY CHAIN ISSUES ARE OCCURRING - (CLICK HERE FOR MORE DETAILS)
LIVE INVENTORY DISABLED: DELAYS FROM GLOBAL SUPPLY CHAIN ISSUES ARE OCCURRING - (CLICK HERE FOR MORE DETAILS)

IAG Performance Stage 2.5 EJ20 Closed Deck Short Block 2002-2005 WRX

SKU IAG-ENG-1258
Original price $4,799.99 - Original price $4,799.99
Original price
$4,799.99
$4,799.99 - $4,799.99
Current price $4,799.99

The IAG Stage 2.5 Short Block starts with brand new Subaru 2.0L engine case halves. 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. Next, the short block is Deck Plate bored and honed to 92.5mm in our in-house Sunnen SV-30 the most advanced automotive cylinder hone available. IAG's in-house honing process is able to set custom piston to wall clearances to best fit your needs. The modified case halves are then assembled using a new Subaru 2.0L crankshaft with improved oil passages that is matched to ACL or King race main bearings. IAG-Spec H-Beam connecting rods and ARP rod bolts are utilized along with ACL or King race rod bearings. The case halves are sealed with new OEM main/case bolts and sealant. Finally, IAG-Spec 92.5mm JE FSR 2618 Forged Pistons with .210" 9310 Steel Wrist Pins are added to finish the Stage 2.5 2.0L short block.

Stage 2.5 Closed Deck Includes:

  • Case Halves -Converted to Closed Deck using brand new Subaru OEM case halves, bored and honed to 92.5mm.
  • Pistons -IAG-Spec JE FSR 92.5mm 2618 Forged Pistons, Ring Set, .210" 9310 Steel Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)
  • Connecting Rods -IAG-Spec H-Beam / ARP2000 Rod Bolts.
  • Rod / Main Bearings -ACL or King Race bearings.
  • Crankshaft -New Subaru WRX 2.0L Crankshaft with improved oil passages.
  • Case / Main Bolts -Standard FHI Subaru case bolts.


Additional Options Available:

  • Oil Pump - IAG Stage 2 CNC Ported EJ 11mm Oil Pump or Subaru JDM 12mm High Volume Oil Pump
  • IAG Oil Pickup - Upgraded oil pickup featuring heavy gauge steel tubing, 2 point bracket & mesh filter
  • IAG Oil Baffle - Upgraded oil control baffle and windage tray
  • IAG Oil Pickup & Baffle Set - Upgraded oil pickup, oil control baffle, and windage tray
  • Hardware / Seal Option -(Wrist pin plugs, washers, separator cover, bolts, etc. In case you don't want to transfer from the original engine).


Compression Ratio:

  • 8.5:1 on S20 Cylinder Heads (EJ20)

Power: The IAG Stage 2.5 Short Block has a power output rating of 700BHP.

*All IAG short blocks are balanced and blueprinted.

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