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IAG Stage 1 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 1 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 1 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 1 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 1 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 1 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 1 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
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User Media for: IAG Stage 1 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)

IAG Stage 1 EJ25 Subaru Short Block

Subaru Models (inc. 2006-2014 WRX / 2004+ STI)

Write a Review | 8 Q&As
Part # IAG-ENG-1002
$3,299.99

Ships within 4 days

Features & Product Details

RallySport Direct carries the highly sought-after, high-performance upgrades and accessories brought to you by IAG Performance. 

On this page, you are looking at the IAG Performance Stage 1 Short Block for your Subaru WRX, STI, Legacy GT and Forester XT. This short block is ideal for lightly modified engines that need a basic and reliable short block. This short block is fitted with forged pistons along with performance main and rod bearings that replace the factory design that is prone to failure. Each Stage 1 short block features new Subaru 2.5L 99.5mm bore EJ25 engine case halves and is carefully measured and assembled using a new 2017+ Nitride treated Subaru 2.5L STI crankshaft.

Here are the details:

  • Brand new Subaru OEM case halves at 99.5mm stock bore
  • IAG-Spec JE 99.5mm Forged Pistons and Ring set
  • .180" chromoly steel pins, clips along with coated skirts and offset wrist pins
  • Early OEM STI connecting rods
  • ACL rod and main bearings 
  • New Subaru Nitride Treated 2017+ STI crankshaft
  • Standard FHI Subaru case bolts
  • Specifications

    Brand: IAG Performance
    Assembly: Assembled
    Bore Size (mm): 99.5
    Compression Ratio: 8.2:1
    Crank: OEM Forged
    Crank Size: OEM
    Displacement: 2.5L
    Piston Material: Forged Aluminum
    Power Output Rating (BHP): 475
    Rods: OEM Forged
    Mfgr. Warranty: 12 Months / 12k Miles
    Condition: New Product
    Return Policy:
    Standard

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    QUESTIONS & ANSWERS

    • Q: Stock Tune   miltownWRX8 months ago

      If i use old intake manifold,lines,ect,,,,,new gaskets,oil pan pickup, timing,, heads resurfaced from a stock 2011 wrx can i still use the Stock tune that came with car or do i need to get it tuned for the car to run properly with the built shortblock?
      • 0 of 0 people found the following answer helpful

        A:  This shortblock will give you a slightly higher compression ratio with 2011 WRX heads. You should be ok with the stock tune, but it might be a good idea to get a tune just to be sure it is running perfectly.

        Jesse F. @ RallySport Direct 6 months ago  
          
        Was this answer helpful?
    • Q: Piston type  Dsquid10 months ago

      What type of forged pistons is this equipped with? High or low expansion aluminum?
    • Q: Iag short block stage 1   Legacy3801 year ago

      Does it come with the pistons? I only see the connecting rods
    • Q: Hi  Chnba2 years ago

      does it fit 2011 jdm forester s-edition/ts ej255?
      • 0 of 0 people found the following answer helpful

        A:  Unfortunately we cannot confirm fitment for the JDM model subarus

        Tylo R @ RallySport Direct
          
        Was this answer helpful?

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