IAG Stage 2.5 EJ25 Subaru Closed Deck Short Block For WRX, STI, LGT, FXT

IAG Stage 2.5 Closed Deck EJ25 2.5L Subaru Short Block for WRX, STI, Forester XT and Legacy GT.
IAG Stage 2.5 Closed Deck Subaru EJ25 Short Block


 
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MSRP: $4,199.99
Our Price: $3,999.99
Savings: $200.00

Availability: Usually Ships in 3 to 4 Weeks
Part#: IAG-ENG-1250


Pistons*:
Manley 99.75mm Platinum
Cosworth 99.75mm Part# 10001431 [Add $300.00]

Wrist Pins*:
Standard .170" Pins
Extreme .210" Pins [Add $100.00]
Not Required, Using Cosworth Pistons

Rod Bolts*:
Standard ARP2000 Rod Bolts
625+ ARP Rod Bolts [Add $200.00]

Head Gaskets*:
JE Pro Seal Gaskets - 1 Pair PN# SB1001-039 [Add $96.00]
Cosworth Gaskets - 1 Pair PN# 20010707 [Add $158.00]
Not Required

Oil Pump*:
Subaru JDM 12mm Oil Pump Part# 15010AA310 [Add $219.00]
Subaru 11mm Oil Pump Part# 15010AA360 [Add $194.95]
Not Required

Seal Kit*:
Wrist Pin / Cover Seals P# IAG-ENG-1720 [Add $105.99]
Not Required

Shipping Method*:
IAG Pelican Case
Cardboard Box

Qty:  
Description Applications
 
IAG Stage 2.5 Subaru EJ25 Closed Deck 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-10. 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 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, your choice of Manley Spec 99.75mm Platinum Forged Pistons or Cosworth 99.75mm Forged Pistons 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 - Manley 99.75mm Platinum Forged Pistons / .170 inch wall tool steel wrist pins
  • Connecting Rods - IAG Spec 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:
  • Pistons - Cosworth 99.75mm Forged Pistons - $300
  • Oil Pump - Subaru JDM 12mm High Volume Oil Pump - $219 or 11mm Subaru Oil Pump - $194.95
  • Rod Bolts- 625+ ARP rod bolts - $200
  • Wrist Pins - Upgrade to Extreme .210 inch 9310 thick-wall wrist pins - $100
  • Head Gaskets - JE Pro Seal .039 inch Head Gaskets - $96 or Cosworth 1.1mm Head Gaskets- $158
  • 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 for B and D casting cylinder heads.
  • *IAG Recommends Cosworth 1.1mm head gaskets for all V and W casting cylinder heads.


The IAG Stage 2.5 Short Block has 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.


Optional Shipping Methods:

Red Carpet Service - IAG Pelican Case (Recommended):
Subaru EJ25 Seal Kit


Red Carpet Service / IAG Pelican Cases are a premium shipping option offered by IAG. Your IAG short block is shipped via a returnable polypropylene military grade IAG Pelican case, which provides optimal protection while in transit. Please contact an IAG sales associate at (410)-840-3555 within 2 business days of your purchase to provide credit card confirmation and approval for Pelican shipping - further details and logistics are explained in our Post Sale PDF document, which can be found below. The IAG Pelican case must simply be returned to IAG within 7 days of the receipt of your engine and carries no additional cost vs. cardboard box shipping. If the case is not returned in the required timeline, a core charge of $399 is placed on your card.

Cardboard Box:
Blocks can alternatively be sent in a standard cardboard box, but bear a greater risk of damage in transit. While cost is the same, we suggest a Pelican case that ensures safe transit.

Please review the PDF document below regarding installation, break-in procedures, warranty information, and our Pelican Case Shipping Service. After ordering your block, please call our sales team at 410-840-3555 to approve Pelican shipping and secure the safest shipping method in the aftermarket!

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



Average Rating: 5 of 5 Total Reviews: 4 Write a review »

  0 of 0 people found the following review helpful:
 
Short Block in Short Time December 4, 2017
Reviewer: Anonymous Person from Albuqeurque, NM United States  
Website says 3-4 weeks. Got mine in just under. It is gorgeous, but will put it in the car...

Cannot wait to start break in!

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  0 of 0 people found the following review helpful:
 
IAG is the best!!! May 18, 2017
Reviewer: Lance Clark from Jacksonville, FL United States  
Excellent!!! Expect nothing else from IAG.

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  0 of 0 people found the following review helpful:
 
Stage 2.5 EJ25 - Couldn't be happier February 8, 2017
Reviewer: Bennie Henson from Reynoldsburg, OH United States  
I've been running this engine for 7 months now along with some of the offered upgrades + Performance Street AOS and this thing is a beast. I followed the break-in procedure and all recommendations for oil changes and oil type to the letter and I'm experiencing no issues whatsoever. Currently I have a 460HP tune on it while I gather more supporting mods. Thanks to IAG for all the help and expert advice.

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  1 of 1 people found the following review helpful:
 
Staged short block March 9, 2016
Reviewer: fritz theodore from Danbury, CT United States  
Haven't installed it yet but love the shipment method
Pelican and love the assistance from the IAG gang.

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