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Free shipping is available within the lower 48 states for orders totaling $199 or more. Simply select the free shipping option during checkout. Even though expedited shipping is not free we will still discount the free shipping option from the expedited shipping cost for you. This offer excludes shipments going to Alaska, Hawaii, Military Boxes, and items too large to ship via UPS or USPS. These items are usually large freight or bulky items such as engine blocks, etc.

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Popular Applications

  • IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)
  • IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)
  • IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)
  • IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)
  • IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)
  • IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)
  • IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)
  • IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)
  • IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)
    IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)


    IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)

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    Fits Your

    IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)
    IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000) IAG Stage 1 2.5L Subaru Short Block | Subaru Multiple Fitments (IAG-ENG-1000)

    Stage 1 Subaru Short Block - 2.5L

    The IAG Stage 1 Short Block is perfect for lightly modified EJ25 Subaru's that need a basic and reliable performance short block. Subaru turbo engines are commonly known for piston ring land failures and if gone unchecked lead to rod knock and total engine failure due to oil starvation from blow by.

    IAG's Stage 1 Short Block includes upgraded forged pistons along with performance main and rod bearings that replace the OEM components that are prone to common failure on Stage 2 and up vehicles. Each IAG Stage 1 Short Block starts with new Subaru 2.5L 99.5mm bore EJ25 engine case halves as standard. The short block is measured and assembled using a new 2012+ Heat Treated Subaru 2.5L STI crankshaft that is matched to ACL or King main bearings.

    Early style OEM STI rods are utilized along with ACL or King rod bearings. The case halves are sealed with new OEM case bolts and sealant. Finally Manley 99.5mm Platinum Series Forged Pistons are spec'd and installed finishing off the short block.

    Features

    • Manley 99.5mm Platinum Series Pistons, Ringset, Tool Steel Pins and Clips (with Coated Skirts and Offset Wrist Pin)
    • New FHI Subaru Case Halves at 99.5mm (Stock Bore)
    • New FHI Subaru Early STI (Stronger Style) Connecting Rods
    • New FHI Subaru Heat Treated 2012+ STI Crankshaft
    • ACL or King Rod Bearings
    • ACL or King Main Bearings
    • New FHI Main Case Bolts
    • IAG Spec Blueprint Sheet
    • Power Output Rating: 475BHP

    Applications

    • 2002 - 2005 Subaru Impreza WRX (w/ mods)
    • 2006 - 2014 Subaru Impreza WRX
    • 2004 - 2014 Subaru Impreza WRX STi
    • 2015 - 2017 Subaru WRX STI
    • 2005 - 2012 Subaru Legacy GT
    • 2004 - 2013 Subaru Forester XT

      DOES NOT FIT THE 2010-2012 Legacy

    Specifications

    • Power Output Rating of 475BHP
    • Compression Ratio: 8.5:1 on D Cylinder Heads (EJ255)
    • Compression Ratio: 8.2:1 on B, V and W Heads (EJ257)

    What's In The Box?

    • 1 - Stage 1 Short Block
    • Mounting Hardware (if applicable)
    • Instructions/Manuals (if applicable)
    • Warranty Information

    Warranty

     

    IAG Performance Warranty

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    MAP Limited Lifetime Warranty

    1.) All MAPerformance in-house fabricated parts include a Limited Lifetime Warranty for the Original Purchaser. This warranty only applies to the original purchaser and is non-transferrable. If the product fails it would need to be determined by MAPerformance that it is due to manufacturing defects in materials or workmanship.

    2.) This does not cover normal wear and tear. Improper use, modification, or abuse voids this warranty. MAPerformance will not be held responsible for additional costs due to the failure of a product (cost of sale, towing, labor, etc.). Warranty claims must be submitted to MAPerformance for review.

    3.) You must create a support ticket to acquire your return authorization number prior to returning the product.

    4.) Warranty claims will not be honored if the product was not purchased through an approved dealer.

    For warranty evaluation please create a support ticket via this form here.

    Hello!

    Unfortunately due to vendor restrictions we are unable to sell this brand within Australia or the UK. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

    Hello!

    Unfortunately due to vendor restrictions we are unable to sell this brand within Australia. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

    Hello!

    Unfortunately due to vendor restrictions we are unable to sell this brand within your country. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

    Hello!

    Unfortunately due to vendor restrictions we are unable to sell this brand within California. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

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