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

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

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 2012+ Subaru 2.5L heat-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 Manley 99.75mm Platinum Series Forged Pistons are spec'd and installed finishing off the short block.

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

*All IAG short blocks are balanced and blueprinted.

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

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 the (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.

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)
  • 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 Heat-Treated 2012+ 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: 2 Write a review »

  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