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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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    Gaskets

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    Short Blocks

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    Timing Belts

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    Rods

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    Long Blocks

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    Pistons and Sleeves

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    Valve Springs

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    Timing Belt Components

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    Valvetrain Components

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    Rod Bearings

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    Tools and Accessories

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    Main Bearings

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    Accessory Belts

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    Cam Gears

    Crankshafts image

    Crankshafts

    Engine Assembly Lube and Sealants image

    Engine Assembly Lube and Sealants

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    Piston Rings and Clips

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    Seals

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    282 Results

    IAG 550 2.5L Subaru Short Block for 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester - 550 BHP

    IAG 550 2.5L Subaru Short Block for 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester - 550 BHP

    $5,459.96
    IAG Performance / Crest CNC Stage X 2.5L Subaru Billet Aluminum Short Block for 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester

    IAG Performance / Crest CNC Stage X 2.5L Subaru Billet Aluminum Short Block for 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester

    $18,959.96
    Fluidampr Harmonic Damper - 2015-2021 Subaru STI / 1998-2013 Forester / 1993-2014 Impreza

    60 In Stock

    531101

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

    5.0(1)
    $482.92
    IAG 950 Closed Deck Long Block Engine w/ IAG 950 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    IAG 950 Closed Deck Long Block Engine w/ IAG 950 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    $18,099.98
    IAG 1150 Closed Deck Long Block Engine w/ IAG 1150 Heads & S2 Cams for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    IAG 1150 Closed Deck Long Block Engine w/ IAG 1150 Heads & S2 Cams for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    $22,849.98
    IAG 550 Long Block Engine w/ IAG 550 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    IAG 550 Long Block Engine w/ IAG 550 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    $14,599.98
    ARP Fasteners Head Stud Kit 11mm - 2004-2021 Subaru STI / 2002-2014 WRX

    53 In Stock

    260-4701

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

    $303.53
    IAG 950 2.35L Destroked Long Block Engine w/ IAG 950 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    IAG 950 2.35L Destroked Long Block Engine w/ IAG 950 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    $18,699.98
    IAG 1150 High Compression 2.5L Subaru Closed Deck Short Block for 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester - 1150 BHP

    IAG 1150 High Compression 2.5L Subaru Closed Deck Short Block for 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester - 1150 BHP

    $10,459.96
    IAG 750 2.5L Subaru Closed Deck Short Block for 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester - 750 BHP

    IAG 750 2.5L Subaru Closed Deck Short Block for 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester - 750 BHP

    $6,459.96
    IAG 1150 2.35L Destroked Long Block Engine w/ IAG 1150 Heads & S3 Cams for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    IAG 1150 2.35L Destroked Long Block Engine w/ IAG 1150 Heads & S3 Cams for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    $23,349.98
    IAG 600 FA20 DIT Long Block Engine w/ IAG 600 Heads for 2015-21 Subaru WRX

    IAG 600 FA20 DIT Long Block Engine w/ IAG 600 Heads for 2015-21 Subaru WRX

    $18,949.96
    IAG 800 FA20 DIT Closed Deck Long Block Engine w/ IAG 800 Heads for 2015-21 Subaru WRX

    IAG 800 FA20 DIT Closed Deck Long Block Engine w/ IAG 800 Heads for 2015-21 Subaru WRX

    $21,449.96
    IAG 1150 Closed Deck Long Block Engine w/ IAG 1150 Heads & S3 Cams for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    IAG 1150 Closed Deck Long Block Engine w/ IAG 1150 Heads & S3 Cams for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    $22,849.98
    Gates Timing Belt Kit w/ Water Pump - 2015-2021 Subaru STI

    26 In Stock

    TCKWP328

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

    $1,188.70
    IAG 950 CNC Ported Race Cylinder Heads Package for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    IAG 950 CNC Ported Race Cylinder Heads Package for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    $6,999.99
    IAG 1150 2.35L Destroked Long Block Engine w/ IAG 1150 Heads & S2 Cams for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    IAG 1150 2.35L Destroked Long Block Engine w/ IAG 1150 Heads & S2 Cams for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    $23,349.98
    Gates Racing Timing Belt Kit w/ Water Pump - 2015-2021 Subaru STI

    22 In Stock

    TCKWP328RB

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

    $480.30
    IAG 1150 EJ25 Destroked 2.35L Closed Deck Short Block for 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester - 1150 BHP

    IAG 1150 EJ25 Destroked 2.35L Closed Deck Short Block for 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester - 1150 BHP

    $11,459.96
    IAG 750 Closed Deck Long Block Engine w/ IAG 750 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    IAG 750 Closed Deck Long Block Engine w/ IAG 750 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

    $16,849.98

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