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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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    Gaskets

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    Short Blocks

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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

    Valves

    Valvetrain Components image

    Valvetrain Components

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    Main Bearings

    Timing Belt Components image

    Timing Belt Components

    Tools and Accessories image

    Tools and Accessories

    Rod Bearings image

    Rod Bearings

    Accessory Belts image

    Accessory Belts

    Crankshafts image

    Crankshafts

    Cam Gears image

    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

    321 Results

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

    4 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

    41 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)

    IAG-ENG-S550

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

    $3,999.99
    Fluidampr Harmonic Damper - 2015-2021 Subaru STI / 1998-2013 Forester / 1993-2014 Impreza

    6 In Stock

    531101

    Fluidampr Harmonic Damper - 2015-2021 Subaru STI / 1998-2013 Forester / 1993-2014 Impreza

    5.0(1)
    $482.92
    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
    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
    Gates Racing Timing Belt Kit w/ Water Pump - 2015-2021 Subaru STI

    1 In Stock

    TCKWP328RB

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

    $480.30
    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
    Gates Timing Belt Kit - 2015-2021 Subaru STI

    4 In Stock

    TCK328

    Gates Timing Belt Kit - 2015-2021 Subaru STI

    $489.99
    PERRIN Lightweight Water Pump Pulley (Red) - 2015-2024 Subaru WRX / 2014-2024 Forester / 2018-2024 Crosstrek / 2020-2024 Outback / Legacy / 2019-2024 Ascent / 2022-2024 BRZ / Toyota GR86

    6 In Stock

    PSP-ENG-111RD

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

    $123.00
    PERRIN Lightweight Crank Pulley for FA/FB Engines with Large Hub - Subaru Models (Inc. 2015-2024 Subaru WRX / 2015-2021 STI / 2014-2024 Forester / 2013-2024 BRZ / 2013-2016 Scion FR-S / 2022-2024 Toyota GR86)

    46 In Stock

    PSP-ENG-104RD

    PERRIN Lightweight Crank Pulley for FA/FB Engines with Large Hub - Subaru Models (Inc. 2015-2024 Subaru WRX / 2015-2021 STI / 2014-2024 Forester / 2013-2024 BRZ / 2013-2016 Scion FR-S / 2022-2024 Toyota GR86)

    $183.60
    GSC Power-Division Viton Valve Stem Seals - Subaru EJ Turbo Models (inc. 2002-2014 WRX / 2004-2021 STI)

    100 In Stock

    1022

    GSC Power-Division Viton Valve Stem Seals - Subaru EJ Turbo Models (inc. 2002-2014 WRX / 2004-2021 STI)

    $16.75
    Gates Stretch Fit AC Belt (Belt For Pulley Kit) - 2015-2021 Subaru STI / 2008-2010 Forester / 2008-2014 Impreza

    12 In Stock

    K040317SF

    Gates Stretch Fit AC Belt (Belt For Pulley Kit) - 2015-2021 Subaru STI / 2008-2010 Forester / 2008-2014 Impreza

    $59.00
    IAG 600 Long Block Engine w/ Stage 2 W25 Heads - 2008-2019 Subaru STI

    IAG-ENG-4010W

    IAG 600 Long Block Engine w/ Stage 2 W25 Heads - 2008-2019 Subaru STI

    $10,449.99
    IAG 550 Street Cylinder Heads Package - N25 Heads (No Cams & Lifters / No Chamber Mods) - 2018-2019 Subaru STI Type RA / 2019-2021 STI

    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
    Manley 15024-4 Forged H Beam Connecting Rods - Subaru Models (inc. 2002-2005 Subaru WRX / 2004-2021 Subaru STI)

    5 In Stock

    15024-4

    Manley 15024-4 Forged H Beam Connecting Rods - Subaru Models (inc. 2002-2005 Subaru WRX / 2004-2021 Subaru STI)

    $578.10
    Subaru OEM Forged Salt Bath Nitrated Crankshaft - 2006-2014 Subaru WRX / 2004-2021 Subaru STI

    12200AA430

    Subaru OEM Forged Salt Bath Nitrated Crankshaft - 2006-2014 Subaru WRX / 2004-2021 Subaru STI

    $531.49
    Tomei Poncam Camshafts - 2008-2021 Subaru STI

    TA301A-SB02C

    Tomei Poncam Camshafts - 2008-2021 Subaru STI

    $880.00
    IAG Performance 750 Closed Deck Includes: Case Halves - Subaru Models (Inc. 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester)

    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

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