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    Short Blocks

    Unlock the potential of your Subaru's engine with a high-performance short block from Subispeed. Our selection features meticulously crafted short blocks that serve as the foundation for powerful and reliable performance upgrades. Engineered to withstand increased power and torque, these short blocks are available for Subaru models such as the WRX, STI, Forester, and Crosstrek. Choose from reputable manufacturers like IAG Performance and Cosworth to ensure exceptional quality and performance. By upgrading to a short block, you'll benefit from reinforced internals, increased displacement, and improved engine strength, allowing you to handle higher levels of power and performance modifications. Take your Subaru's engine to the next level with a high-performance short block from Subispeed and unleash the full potential of your driving experience.

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    33 Results

    IAG Performance 550 Short Block Includes: Case Halves - Subaru Models (Inc. 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester)

    6 In Stock

    IAG-ENG-S550

    IAG Performance 550 Short Block Includes: Case Halves - Subaru Models (Inc. 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester)

    $4,799.99
    IAG Performance / Willall Stage X 2.5L Subaru Billet Aluminum Short Block - Subaru Models (Inc. 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester)

    IAG-ENG-1611

    IAG Performance / Willall Stage X 2.5L Subaru Billet Aluminum Short Block - Subaru Models (Inc. 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester)

    $17,599.99
    Subaru OEM STI Type RA Short Block - 2018 Subaru Type RA / 2019-2021 STI

    10103AD020

    Subaru OEM STI Type RA Short Block - 2018 Subaru Type RA / 2019-2021 STI

    5.0(1)
    $3,013.63
    IAG Performance 750 Closed Deck Includes: Case Halves - Subaru Models (Inc. 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester)

    1 In Stock

    IAG-ENG-S750

    IAG Performance 750 Closed Deck Includes: Case Halves - Subaru Models (Inc. 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester)

    $5,499.99
    IAG Stage 4 TUFF Closed Deck Short Block - 2015-2021 Subaru STI / 2004-2013 Forester / 2004-2014 Impreza

    IAG-ENG-1452

    IAG Stage 4 TUFF Closed Deck Short Block - 2015-2021 Subaru STI / 2004-2013 Forester / 2004-2014 Impreza

    $6,599.99
    IAG Stage 3 Extreme FA20 DIT Subaru Closed Deck Short Block - 2015-2021 Subaru WRX

    IAG-ENG-1313

    IAG Stage 3 Extreme FA20 DIT Subaru Closed Deck Short Block - 2015-2021 Subaru WRX

    $5,999.99
    IAG 600 FA20 DIT Subaru Short Block - 2015-2021 Subaru WRX / 2014-2018 Forester

    IAG-ENG-S600

    IAG 600 FA20 DIT Subaru Short Block - 2015-2021 Subaru WRX / 2014-2018 Forester

    5.0(1)
    $6,119.99
    HKS Short Block FA24 2.5L High Comp - Step 2 - 2022-2024 Subaru BRZ / Toyota GR86

    23011-AT008

    HKS Short Block FA24 2.5L High Comp - Step 2 - 2022-2024 Subaru BRZ / Toyota GR86

    $13,000.00
    IAG 800 CNC Pocket Ported Competition Cylinder Heads Package (Includes Kelford A "272" Cams, Cam Towers, Lifters & Rockers) - 2015-2021 Subaru WRX / 2015-2016 STI

    IAG-ENG-H800L

    IAG 800 CNC Pocket Ported Competition Cylinder Heads Package (Includes Kelford A "272" Cams, Cam Towers, Lifters & Rockers) - 2015-2021 Subaru WRX / 2015-2016 STI

    $6,999.99
    IAG 950 EJ25 Subaru Short Block - Subaru Models (Inc. 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester)

    IAG-ENG-S950

    IAG 950 EJ25 Subaru Short Block - Subaru Models (Inc. 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester)

    $6,499.99
    IAG 1150 2.5L Subaru Short Block - Subaru Models (Inc. 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester)

    IAG-ENG-S115

    IAG 1150 2.5L Subaru Short Block - Subaru Models (Inc. 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester)

    $9,499.99
    IAG 600 Street Cylinder Heads Package (Includes Kelford EZ Cams, Cam Towers, Lifters & Rockers) - 2015-2021 Subaru WRX / 2015-2016 STI

    IAG-ENG-H600L

    IAG 600 Street Cylinder Heads Package (Includes Kelford EZ Cams, Cam Towers, Lifters & Rockers) - 2015-2021 Subaru WRX / 2015-2016 STI

    $5,999.99
    IAG 550 Street Cylinder Heads Package - N25 Heads (No Cams & Lifters / No Chamber Mods) - 2018-2019 Subaru STI Type RA / 2019-2021 STI

    1 In Stock

    IAG-ENG-H550NE

    IAG 550 Street Cylinder Heads Package - N25 Heads (No Cams & Lifters / No Chamber Mods) - 2018-2019 Subaru STI Type RA / 2019-2021 STI

    $3,399.99
    IAG Stage 4 EXTREME 2.5L Subaru Closed Deck Short Block - 2015-2014 Subaru STI / 2004-2013 Forester / 2004-2014 Impreza

    IAG-ENG-1453

    IAG Stage 4 EXTREME 2.5L Subaru Closed Deck Short Block - 2015-2014 Subaru STI / 2004-2013 Forester / 2004-2014 Impreza

    $8,799.99
    IAG 600 FA20 Subaru Short Block (10.5:1 Compression Ratio) - 2013-2021 Scion FRS / Subaru BRZ / Toyota 86

    1 In Stock

    IAG-ENG-S686L

    IAG 600 FA20 Subaru Short Block (10.5:1 Compression Ratio) - 2013-2021 Scion FRS / Subaru BRZ / Toyota 86

    $6,119.99
    IAG 550 Street Cylinder Head Package - D25 Heads (No Cams & lifters / No chamber Mods) - 2006-2014 Subaru WRX / 2006-2013 Forester XT / 2007-2009 Legacy GT

    IAG-ENG-H550DE

    IAG 550 Street Cylinder Head Package - D25 Heads (No Cams & lifters / No chamber Mods) - 2006-2014 Subaru WRX / 2006-2013 Forester XT / 2007-2009 Legacy GT

    $3,399.99
    IAG 800 CNC Pocket Ported Competition Cylinder Heads Package (Does NOT Include Kelford A "272" Cams, Cam Towers, Lifters & Rockers) - 2015-2021 Subaru WRX / 2015-2016 STI

    IAG-ENG-H800E

    IAG 800 CNC Pocket Ported Competition Cylinder Heads Package (Does NOT Include Kelford A "272" Cams, Cam Towers, Lifters & Rockers) - 2015-2021 Subaru WRX / 2015-2016 STI

    $4,249.99
    IAG 800 BHP FA20 Subaru Short Block (12.5:1 Compression Ratio) - 2013-2021 Scion FRS / Subaru BRZ / Toyota 86

    IAG-ENG-S886H

    IAG 800 BHP FA20 Subaru Short Block (12.5:1 Compression Ratio) - 2013-2021 Scion FRS / Subaru BRZ / Toyota 86

    $6,499.99
    IAG 800 BHP FA20 Subaru Short Block (10.5:1 Compression Ratio) - 2013-2021 Scion FRS / Subaru BRZ / Toyota 86

    IAG-ENG-S886L

    IAG 800 BHP FA20 Subaru Short Block (10.5:1 Compression Ratio) - 2013-2021 Scion FRS / Subaru BRZ / Toyota 86

    $6,499.99
    IAG 550 Street Cylinder Heads Package - W25 Heads (Includes Cams & Lifters / No Chamber Mods) - 2008-2018 Subaru STI

    IAG-ENG-H550WL

    IAG 550 Street Cylinder Heads Package - W25 Heads (Includes Cams & Lifters / No Chamber Mods) - 2008-2018 Subaru STI

    $5,149.99

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