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IAG Stage 2 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 2 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 2 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 2 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 2 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 2 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
IAG Stage 2 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)
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User Media for: IAG Stage 2 EJ25 Subaru Short Block - Subaru Models (inc. 2006-2014 WRX / 2004+ STI)

IAG Stage 2 EJ25 Subaru Short Block

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

Read 2 Reviews | 20 Q&As
Part # IAG-ENG-1202
$3,499.99

In stock!

Features & Product Details

RallySport Direct proudly carries the highly sought-after high-performance upgrades and accessories brought to you by IAG Performance. Whether you’re building a wild race car, rally car, overlander or just want more reliability in your mild daily drive build, look no further than IAG!

On this page, you are looking at the IAG Performance Stage 2 Short Block. This short block features stronger connecting rods that are combined with forged pistons that are carefully assembled with a new 2017+ Subaru 2.5L Nitride treated STI crankshaft that is matched with ACL bearings.

This short block has a power output rating of 575BHP.

Here are the details:

  • Brand new Subaru OEM case halves bored and honed in-house to 99.5mm
  • IAG-Spec JE 99.5mm Forged Pistons and Ring set
  • .180" chromoly steel pins, clips along with coated skirts and offset wrist pins
  • IAG-Spec H-Beam Rods
  • ARP2000 Rod bolts
  • ACL rod and main bearings 
  • New Subaru Nitride Treated 2017+ STI crankshaft
  • Standard FHI Subaru case bolts
  • Note: Compression ratio is subject to change based on cylinder heads and head gaskets used. 

  • 8.2:1 on B, V, and W cylinder heads (EJ257)
  • 8.5:1 on D cylinder heads (EJ255)
  • 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): 575
    Rods: Forged
    Mfgr. Warranty: 12 Months / 12k Miles
    Condition: New Product
    Return Policy:
    Standard

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    REVIEWS & CUSTOMER MEDIA

    2 Reviews
    5 out of 5 Stars
    5 Stars
    (2)
    4 Stars
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    3 Stars
    (0)
    2 Stars
    (0)
    1 Stars
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    Customer Photos and Videos
    IAG Stage 2 EJ25 Subaru Short Block ( Part Number: IAG-ENG-1202)
    2017 STI 1 year ago
    5out of 5stars

    Awesome motor to put some of your hard earned money into.....I have right under 400 whp.....daily driver....15k miles on it without 1 issue.....my stock motor blew up with 10k..... And not half as powerful well probly half!.... I'm so happy with this.
      
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    24hr to ship 1 year ago
    5out of 5stars

    Just ordered mine from IAG. 2-3 week potential processing. Seeing 24 hours on here makes my skin crawl..... either way can't wait for it to come in!
      
    Was this review helpful?

    QUESTIONS & ANSWERS

    • Q: Head gasket kit   XxwrxX4 months ago

      Hi what head gasket kit should I run for the IAG stage 2 block. I’m confused because it comes with oem 99.5 bore but all the head gasket kits are bigger bore like 100. Also what thickness? Can you give me a link or part number for the full head gasket kit please? Thank you.
      • 0 of 0 people found the following answer helpful

        A:  IAG recommends using OEM head gaskets with their open deck blocks. We would suggest contacting IAG directly, or your engine builder to see what they recommend.

        Lane H. @ RallySport Direct 1 month ago  
          
        Was this answer helpful?
    • Q: Oem head bolts/studs  XxwrxX4 months ago

      Can I run oem head bolts or do I have to run upgraded head studs? If I have to run upgraded head studs which ones screw right in? I already have this IAG stage 2 short block in my possession but my oem heads are getting sent out to be machined, valve adjustment etc. please let me know what I can do. And what I should do. Thank you. I appreciate your time.
      • 1 of 1 people found the following answer helpful

        A:  You can use the OEM head bolts, but the ARP 11mm head studs would be a recommended upgrade.

        Lane H. @ RallySport Direct 4 months ago  
          
        Was this answer helpful?
    • Q: Head Gaskets  Devereaux5 months ago

      I’m looking into getting Tomei Head Gaskets what’s the best size for this setup, I’m looking into pushing around 450whp
      • 0 of 0 people found the following answer helpful

        A:  That depends on your intended compression ratio, give us a call and we can find the best option for your build.

        Lane H. @ RallySport Direct 5 months ago  
          
        Was this answer helpful?
    • Q: Oil pan   Shogun3609 months ago

      Will I be able to run my OEM oil pan and pick up with this? Or is that something I should upgrade before Running this short block?
      • 0 of 0 people found the following answer helpful

        A:  Killer B Motorsport Oil Pickup and Baffle Combo Subaru Models (inc. 2002-2014 WRX / 2004+ STI) That can go in your oem oil pan depending on your year/model.

        Snowmass STI
          
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    • Q: Head studs   Paul12 months ago

      Will the arp 11mm 220,000 psi head studs work just fine?? My block was delivered a couple days ago so excited to work with you guys!! Get it protuned my Travis Cooke in mid June

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