IAG Stage 2 Tuff 2.5L Subaru Short Block for WRX, STI, Legacy GT, Forester XT

IAG Stage 2 Tuff 2.5L Subaru Short Block for Subaru WRX, STI, Forester XT and Legacy GT.
IAG Stage 2 Tuff Built 2.5L Subaru Short Block

Alternative Views:

MSRP: $3,517.49
Our Price: $3,349.00
Savings: $168.49

Availability: Usually Ships in 3 to 4 Weeks
Part#: IAG-ENG-1211

Manley 99.75mm Platinum
Cosworth 99.75mm [Add $300.00]

Seal Kit*:
Wrist Pin / Cover Seals P# IAG-ENG-1720 [Add $99.99]
Not Required

Shipping Method*:
IAG Pelican Case
Cardboard Box

Description Applications

IAG Stage 2 Tuff Short Block

The IAG Stage 2 Tuff short block starts with new Subaru 2.5L EJ25 engine case halves that are bored and honed to 99.75 on our in-house Sunnen SV-10. 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 2017+ Subaru 2.5L nitride treated STI crankshaft that is matched to ACL or King race main bearings. Next, Manley H-Tuff forged rods with ARP Rod Bolts are utilized to increase the power rating slightly at the expense of being heavier. The connecting rods are matched to ACL or King race rod bearings. The case halves are sealed with new OEM main case bolts and sealant. Finally, you have the choice to add Manley 99.75mm Platinum Series Forged Pistons or Cosworth forged pistons to finish off the short block.

The IAG Stage 2 Tuff Short Block has a power output rating of 675BHP.

Stage 2 Tuff Short Block Includes:
  • Case Halves - Brand new Subaru OEM case halves, bored and honed to 99.75mm.
  • Pistons - Manley 99.75mm Platinum Forged Pistons
  • Connecting Rods - Manley H Tuff / 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
  • Hardware / Seals - OEM cover and seal kit - $99.99

Compression Ratio:
  • 8.5:1 on D Cylinder Heads (EJ255)
  • 8.2:1 on B, V and W EJ257 Heads with standard thickness gasket.

*All IAG short blocks are balanced and blueprinted.

Hardware / Seal Option:

Not planning on reusing your original short block service plugs and covers? IAG offers a simple comprehensive OEM cover and seal kit that includes (1) Rear main seal, (3) wrist pin plugs, (3) wrist pin plug washers, (1) separator cover, (6) separator cover bolts, (1) wrist pin service cover, (1) wrist pin service cover O-ring and (2) wrist pin service cover screws. *If you are reusing your original wrist pin service plugs and covers always replace the (3) 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

  • Manley 99.75mm Platinum Series Pistons, Ringset, Tool Steel Pins and Clips (w/ Coated Skirts and Offset Wrist Pin)
    Cosworth 99.75mm Forged Pistons Optional
    IAG Spec Bore and Hone (Performed on our in-house Sunnen SV-10)
    Tighter piston to wall clearance for quiet operation
    New FHI Subaru Case Halves (Bored, Honed and Plateau Brushed)
    Manley H-Tuff Forged Connecting Rods w/ ARP Rod Bolts (Heavier Version of H-beam Rods)
    New FHI Subaru Nitride Treated 2017+ STI Crankshaft
    ACL or King Race Rod Bearings
    ACL or King Race Main Bearings
    New FHI Main Case Bolts
    IAG Spec Blueprint Sheet
    Power Output Rating: 675BHP
Average Rating: 5 of 5 Total Reviews: 5 Write a review »

  0 of 0 people found the following review helpful:
Wouldn't trust anyone else March 2, 2017
Reviewer: Lyssa Lombardo from Wellington, CO United States  
After we found out our RSTi had a blown ringland, the next step was clear: call IAG and get the ball rolling on the Stage 2 Tuff block.

From the ease of ordering (my pocketbook and fiancé were both a little miffed at me for a bit) to the beautiful condition the block was in when it arrived, working with IAG was a dream.

My only tiny complint is that we never received shipping information, by a quick call to Keith changed that and he was so pleasant over the phone.

10/10 would recommend to everyone!!

Was this review helpful to you?

  0 of 0 people found the following review helpful:
Excellent quality February 13, 2017
Reviewer: Jacob Greinetz from Orinda, CA United States  
Very happy with the way the block was packaged and condition it arrived in. Have not started it up yet, but quality of workmanship looks top notch.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
Stage 2 Tuff December 14, 2016
Reviewer: Mat E. from Mishawaka, IN United States  
I had worked with Drew on this product. Great guy, and very helpful. Answered every question I had, made suggestions, and guided me to this staged package. Beautiful short block.

Great work Drew!
Great work IAG!

Was this review helpful to you?

  0 of 0 people found the following review helpful:
IAG stage 2 Tuff block June 10, 2016
Reviewer: ryan wurfel from brunswick, ME United States  
Went with IAG block for the first time. Quality has been proven from what I have seen and heard from others. Pricing is practically unmatched. 12 month warranty. Quick turn around on builds. Pelican case shipping. Case worked so well I purchased my own from Pelican for long term storage just oiled and fogged block inside bag that it was shipped in.

Was this review helpful to you?

  1 of 1 people found the following review helpful:
excellent service October 19, 2015
Reviewer: Lara Matsushige from Mililani, HI United States  
one of the most professional shops I've dealt with. took care of everything every step of the way with the short block arriving packaged in a Pelican case! wish more businesses were like them

Was this review helpful to you?

Stay Connected with IAG