IAG 550 EJ25 Built Subaru Short Block – Subaru

$5,440.82

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Documents

Installation Instructions & Videos

SKU: IAG-ENG-S550 Category: Tags: , , , Brand:

IAG 550 EJ25 2.5L SUBARU SHORT BLOCK

Stage 2 Short Block H-Beam Connecting Rods

DESIGNED FOR STRENGTH

The IAG 550 Short Block is designed for modified EJ25 Subarus that need a stronger short block to support increased cylinder pressures created by additional boost pressure. The IAG 550 short block features IAG Spec H-Beam forged connecting rods. The upgraded connecting rods and race bearings are able to support additional engine load produced by larger turbochargers or increased boost which the OEM STI rods found in the Stock short blocks cannot support reliably.

BUILT WITH 100% NEW COMPONENTS

Each IAG 550 Short Block starts with brand new EJ25 Subaru 2.5L, 99.5mm stock bore engine case halves as standard. The case haves are carefullly measured and assembled using a new 2017+ Subaru 2.5L nitride treated STI crankshaft, which is matched to ACL or King race main bearings. The IAG 550 Short Block features IAG Spec H-Beam Connecting Rods with ARP2000 rod bolts, along with ACL or King race rod bearings. The case halves are sealed with new OEM main case bolts and sealant. Finally, IAG Spec JE 99.5mm Forged Pistons are carefully selected, measured, and installed to finish off the short block.

EJ25 STI Crankshaft
IAG Stage 2 Short Block

FORGED PISTONS, DESIGNED FOR BOOST

Each IAG 550 Short Block features IAG Spec JE 99.5mm Forged Pistons. These 2618 T6 Alloy high-strength pistons have been specifically designed to support increased cylinder pressures which come with more boost. This is accomplished by using an asymmetrical skirt design instead of the traditional full-round skirt, also this reduces weight significantly. Featuring smooth-flowing radii on the domes and dishes, the design promotes excellent flame travel. The pistons are secured to the rods with .905 x 2.250″ x .180″ wall carbon steel wrist pins with Tru Arc locks.

IAG 550 Short Block Includes:

  • Case Halves –Brand new Subaru OEM case halves 99.5mm stock bore
  • Pistons –IAG-Spec JE 99.5mm Forged Pistons, Ring Set, .180″ Chromoly Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pin)
  • Connecting Rods –IAG-Spec H-Beam Rods with ARP2000 rod bolts
  • Rod / Main Bearings –ACL or King Race Bearings
  • Crankshaft –Standard New Subaru Nitride Treated 2017+ STI Crankshaft
  • Case / Main Bolts –Standard FHI Subaru case bolt
  • Compression Ratio:8.5:1 on D Cylinder Heads (EJ255), 8.2:1 on B, V, and W EJ257 Heads with standard thickness gasket.

Power Rating: The IAG 550 Short Block has a power output rating of 550 BHP

Additional information

Weight60.00 kg
Dimensions50.00 × 50.00 × 45.00 cm

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Applications

Models suitable for this product

MakeModelYearSubmodel
MakeModelYearSubmodel
SubaruBaja2004 - 2006XT - 2.5L Turbo AWD
SubaruForester2004 - 20132.5XT
SubaruImpreza2004 - 2014WRX STi
SubaruImpreza2006 - 2014WRX
SubaruLegacy2005 - 20122.5GT
SubaruLegacy2006 - 2009Spec B.
SubaruOutback2005 - 20092.5XT
SubaruWRX2006 - 2014
SubaruWRX STi2004 - 2021

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