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    Motor Builds

    With a skillfully built motor build from Subispeed, you can unleash the full performance potential of your Subaru. Our motor build services are designed for enthusiasts who want their engines to run better overall and have more power and dependability. Our skilled specialists collaborate directly with you to develop a bespoke motor build that adheres to your unique objectives and specifications, whether you're wanting to boost horsepower, enhance torque, or build a high-performance track machine. To ensure optimum performance and long-term durability, we use premium components from reliable manufacturers like IAG Performance and Crawford Performance. Each component, from improved cylinder heads and camshafts to forged pistons and rods, is meticulously chosen and expertly installed to produce outstanding performance benefits. Count on Subispeed for meticulous engine assembly, careful testing, and precise engine machining.

    Shop Motor Builds Upgrades by Category

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    Engine Hardware and Fittings

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    Pulleys

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    Short Blocks

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    Gaskets

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    Head Gaskets

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    Cams

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    Timing Belts

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    Rods

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    Pistons and Sleeves

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    Long Blocks

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    Valve Springs

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    Main Bearings

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    Timing Belt Components

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    Valvetrain Components

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    Rod Bearings

    Tools and Accessories image

    Tools and Accessories

    Crankshafts image

    Crankshafts

    Accessory Belts image

    Accessory Belts

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    Cam Gears

    Tensioners & Idlers image

    Tensioners & Idlers

    Engine Assembly Lube and Sealants image

    Engine Assembly Lube and Sealants

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    Piston Rings and Clips

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    Seals

    Shop featured products

    331 Results

    Gates Timing Belt Kit w/ Water Pump - 2015-2021 Subaru STI

    21 In Stock

    TCKWP328

    Gates Timing Belt Kit w/ Water Pump - 2015-2021 Subaru STI

    $1,188.70
    ARP Fasteners Head Stud Kit 11mm - 2004-2021 Subaru STI / 2002-2014 WRX

    115 In Stock

    260-4701

    ARP Fasteners Head Stud Kit 11mm - 2004-2021 Subaru STI / 2002-2014 WRX

    $303.53
    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
    GrimmSpeed Head Gasket Set [1.5mm] - 2004-2007 Subaru STI / 2008-2014 WRX / 2004-2008 Forester XT / 2005-2009 Legacy GT [EJ25 SAVCS]

    14 In Stock

    GrimmSpeed Head Gasket Set [1.5mm] - 2004-2007 Subaru STI / 2008-2014 WRX / 2004-2008 Forester XT / 2005-2009 Legacy GT [EJ25 SAVCS]

    $146.00
    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
    GrimmSpeed Blow Off Valve Flange Gasket - 2015-2021 Subaru STI

    50 In Stock

    020023

    GrimmSpeed Blow Off Valve Flange Gasket - 2015-2021 Subaru STI

    5.0(1)
    $14.00
    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
    Gates Racing Timing Belt Kit w/ Water Pump - 2015-2021 Subaru STI

    33 In Stock

    TCKWP328RB

    Gates Racing Timing Belt Kit w/ Water Pump - 2015-2021 Subaru STI

    $480.30
    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
    Cusco Aluminum Pulley Set - 2015-2021 Subaru STI / 1998-2012 Forester / 1993-2014 Impreza

    1 In Stock

    6A1733A

    Cusco Aluminum Pulley Set - 2015-2021 Subaru STI / 1998-2012 Forester / 1993-2014 Impreza

    $313.03
    PERRIN Lightweight Crank Pulley - Red - Subaru Models (inc. 2015-2021 STI / 1998-2012 Forester / 1993-2014 Impreza / 1993-2009 Legacy)

    20 In Stock

    PSP-ENG-100RD

    PERRIN Lightweight Crank Pulley - Red - Subaru Models (inc. 2015-2021 STI / 1998-2012 Forester / 1993-2014 Impreza / 1993-2009 Legacy)

    4.0(1)
    $125.00
    Manley Economical H Beam Steel Connecting Rod - Subaru Models (inc. 2002-2005 Subaru WRX / 2004-2021 Subaru STI)

    13 In Stock

    14024-4

    Manley Economical H Beam Steel Connecting Rod - Subaru Models (inc. 2002-2005 Subaru WRX / 2004-2021 Subaru STI)

    $518.00
    Manley Performance Platinum Series Piston Set 99.55mm 8.5:1 - Subaru Models (inc. 2006-2014 Subaru WRX / 2004-2021 Subaru STI)

    1 In Stock

    612001C-4

    Manley Performance Platinum Series Piston Set 99.55mm 8.5:1 - Subaru Models (inc. 2006-2014 Subaru WRX / 2004-2021 Subaru STI)

    $699.23
    PERRIN Lightweight Water Pump Pulley (Black) - 2015-2024 Subaru WRX / 2014-2024 Forester / 2018-2024 Crosstrek / 2020-2024 Outback / Legacy / 2019-2024 Ascent / 2022-2024 BRZ / Toyota GR86

    8 In Stock

    PSP-ENG-111BK

    PERRIN Lightweight Water Pump Pulley (Black) - 2015-2024 Subaru WRX / 2014-2024 Forester / 2018-2024 Crosstrek / 2020-2024 Outback / Legacy / 2019-2024 Ascent / 2022-2024 BRZ / Toyota GR86

    $104.60
    Subaru Fuse Box Cover / Coin Box Retention Clips - 2015-2021 Subaru WRX / STI / 2014-2020 Forester / 2013-2020 Crosstrek

    66173AJ00A

    Subaru Fuse Box Cover / Coin Box Retention Clips - 2015-2021 Subaru WRX / STI / 2014-2020 Forester / 2013-2020 Crosstrek

    4.8(4)
    $3.71
    Manley Performance Turbo Tuff Series Crankshaft 79mm Subaru EJ25 Models - Subaru Models (inc. 2006-2014 Subaru WRX / 2004-2021 Subaru STI)

    3 In Stock

    190040B

    Manley Performance Turbo Tuff Series Crankshaft 79mm Subaru EJ25 Models - Subaru Models (inc. 2006-2014 Subaru WRX / 2004-2021 Subaru STI)

    $1,954.24
    IAG 900 Closed Deck Long Block Engine w/ Stage 4 Heads & GSC S2 Cams - 2008-2021 Subaru STI

    IAG-ENG-4025WS2

    IAG 900 Closed Deck Long Block Engine w/ Stage 4 Heads & GSC S2 Cams - 2008-2021 Subaru STI

    $12,749.99

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