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IAG Stage 2.5 Subaru Closed Deck 2.5L Short Block For WRX/STI/LGT/FXT
IAG Stage 2.5 Subaru Closed Deck 2.5L Short Block For WRX/STI/LGT/FXT


 
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Our Price: $4,799.99



Product Code: IAG-ENG-1252


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Oil Pump:


Seal Kit :


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Description
 
IAG Stage 2.5 Subaru Closed Deck 2.5L Short Block

The IAG Stage 2.5 Short Block starts with brand new Subaru 2.5L 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 99.75mm 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 2017+ Subaru 2.5L nitride treated STI crankshaft that is matched to ACL or King race main bearings.

IAG-Spec Tuff 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 (upgrading to ARP mains requires line honing). Finally, IAG-Spec 99.75mm JE FSR 2618 Forged Pistons with .210" 9310 Steel Wrist Pins are added to finish the Stage 2.5 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 99.75mm.
  • Pistons - IAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Ring Set, .210" 9310 Steel Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)
  • Connecting Rods - IAG-Spec Tuff H-Beam / 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 bolts.

Additional Options Available:
  • Oil Pump - Subaru JDM 12mm High Volume Oil Pump - $219 or 11mm Subaru Oil Pump - $199.95
  • Head Gaskets - JE Pro Seal .039 inch Head Gaskets - (PN# SB1001-039 for D25 & B25 Heads, PN# SB1003-039 for V25, W25 & N25 Heads)
  • IAG Oil Pickup - Upgraded oil pickup featuring heavy gauge steel tubing, 2 point bracket & mesh filter - $129.99
  • Hardware / Seal Option - $105.99 (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 D Cylinder Heads (EJ255)
  • 8.2:1 on B, V and W EJ257 Heads with standard thickness gasket.

Head Gasket Recommendations:
  • *IAG Recommends JE Pro Seal .039 inch head gaskets
  • JE PN# SB1001-039 are for use with S20, B25 & D25 Cylinder Head Castings (04-06 STI, 06-14 WRX, 04-13 FXT, 05-12 LGT, 02-05 WRX)
  • JE PN# SB1003-039 are for use with V25, W25 & N25 Cylinder Head Casting (2007-19 STI)


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

*All IAG short blocks are balanced and blueprinted.



Hardware / Seal Option:

Subaru EJ25 Seal Kit
Not planning on reusing your original short block service plugs and covers? IAG offers a simple comprehensive cover and seal kit that includes (1) Rear main seal, (3) OEM wrist pin plugs, (3) OEM wrist pin plug washers, (1) OEM separator cover, (6) OEM separator cover bolts, (1) OEM wrist pin service cover, (1) OEM wrist pin service cover O-ring and (2) OEM wrist pin service cover screws. *If you are reusing your original wrist pin service plugs and covers always replace the (3) OEM wrist pin plug washers and (1) wrist pin service cover O-ring before installing a short block to avoid potential leaks. *Never reuse a rear main seal on a new short block.



Please review the PDF document below regarding installation, break-in procedures and warranty information.

PDF After Sale Document - Contains Shipping, Engine Care and Warranty Information


WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov.

IAG (Standard) Short Block Warranty Limitations are as follows:
  • Standard Warranty period begins on the day the engine was delivered.

  • Standard Warranty applies only to short block components manufactured and assembled by IAG Performance.

  • Standard Warranty does not extend to any other part of the engine, turbocharger, accessories, or vehicle in which the engine is installed, or subsequent damage to any component or part of the vehicle due to an engine failure.

  • Standard Warranty coverage excludes any shipping costs incurred to return the product to our facility. If the warranty claim is denied, the client will be responsible for return shipping from our facility.

  • Standard Warranty coverage excludes any and all labor expenses needed for reassembly, as well as any components (i.e. gaskets, fluids, etc.) required for reinstallation.

  • Standard Warranty is only offered if the short block is professionally installed, with receipts provided.

  • Standard Warranty is non-transferrable and only offered to the original purchaser of the engine.

  • All parts used in the assembly of the IAG built short block carry the manufacturer’s individual component warranties. No warranty is expressed or implied for any customer-supplied components.

  • Standard Warranty clients are responsible for initiating a warranty claim with IAG directly.

  • The client agrees that they will be held responsible for all engine tear down costs for claims deemed insufficient and/or invalid.

  • Proof of proper maintenance is the owner’s responsibility.

  • Any covered repairs or replacement will not extend the warranty period.

  • You must register your engine by completing the online form at https://www.iagperformance.com/warranty
Model Year & Fitment
  • 2002 Subaru WRX (Requires Mods)
  • 2003 Subaru WRX (Requires Mods)
  • 2004 Subaru WRX (Requires Mods)
  • 2005 Subaru WRX (Requires Mods)
  • 2006 Subaru WRX
  • 2007 Subaru WRX
  • 2008 Subaru WRX
  • 2009 Subaru WRX
  • 2010 Subaru WRX
  • 2011 Subaru WRX
  • 2012 Subaru WRX
  • 2013 Subaru WRX
  • 2014 Subaru WRX
  • 2004 Subaru STI
  • 2005 Subaru STI
  • 2006 Subaru STI
  • 2007 Subaru STI
  • 2008 Subaru STI
  • 2009 Subaru STI
  • 2010 Subaru STI
  • 2011 Subaru STI
  • 2012 Subaru STI
  • 2013 Subaru STI
  • 2014 Subaru STI
  • 2015 Subaru STI
  • 2016 Subaru STI
  • 2017 Subaru STI
  • 2018 Subaru STI
  • 2005 Subaru Legacy GT
  • 2006 Subaru Legacy GT
  • 2007 Subaru Legacy GT
  • 2008 Subaru Legacy GT
  • 2009 Subaru Legacy GT
  • 2004 Subaru Forester XT
  • 2005 Subaru Forester XT
  • 2006 Subaru Forester XT
  • 2007 Subaru Forester XT
  • 2008 Subaru Forester XT
  • 2009 Subaru Forester XT
  • 2010 Subaru Forester XT
  • 2011 Subaru Forester XT
  • 2012 Subaru Forester XT
  • 2013 Subaru Forester XT

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