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    Overflow & Expansion Tanks

    There are a couple of reasons for why you would want to replace your factory coolant overflow and expansion tanks. For example, if you drive any Subaru turbo model, take a look at your factory expansion tank. Notice how it hurts the eyes. Now look at the coolant overflow tank. It is plastic, kind of yellow, and honestly it kind of looks like a medical dispenser of some sorts. The fact is that if you're trying to win a car show, then the factory coolant expansion and overflow tanks are going to hurt your chances. And although they do work and do their job well, RallySport Direct carries a great selection of attractive overflow, and coolant expansion tanks that will enhance that dusty engine bay of yours.

    Most of the offerings from RallySport Direct are going to come in an aluminum construction. Some will come powder-coated, and some will come polished. Some are universal, and some are vehicle specific. For example, do you have a Nissan GTR? Replace that boogie man of a coolant expansion tank with the AMS Performance Coolant Expansion Tank Kit. If you drive a Subaru WRX or STI, there are several great examples from Mishimoto, COBB, Killer B Motorsport, Moroso and PERRIN among other great brands.

    And while you're updating your overflow and expansion tanks, take a moment and upgrade the rest of your cooling system and check out our large selection of radiators, as well as radiator caps and thermostats. 

    Shop featured products

    36 Results

    Mishimoto Rockstar Aluminum Coolant Expansion Tank - 2002-2007 Subaru WRX / 2004-2021 STI

    MMRT-WRX-01ERKST

    Mishimoto Rockstar Aluminum Coolant Expansion Tank - 2002-2007 Subaru WRX / 2004-2021 STI

    4.0(1)
    $192.48
    Mishimoto Aluminum Coolant Expansion Tank - 2008-2014 Subaru WRX

    MMRT-WRX-08E

    Mishimoto Aluminum Coolant Expansion Tank - 2008-2014 Subaru WRX

    5.0(1)
    $247.67
    Mishimoto Aluminum Coolant Expansion Tank Black - 2008-2014 Subaru WRX

    5 In Stock

    MMRT-WRX-08EBK

    Mishimoto Aluminum Coolant Expansion Tank Black - 2008-2014 Subaru WRX

    4.0(1)
    $247.67
    COBB Tuning Overflow Tank w/Washer Fluid Relocation Kit - 2004-2007 Subaru WRX/STI

    800630

    COBB Tuning Overflow Tank w/Washer Fluid Relocation Kit - 2004-2007 Subaru WRX/STI

    2.0(1)
    $260.00
    Mishimoto Coolant Expansion Tank Black - 2002-2007 Subaru WRX / 2004-2016 STI

    14 In Stock

    MMRT-WRX-01EBK

    Mishimoto Coolant Expansion Tank Black - 2002-2007 Subaru WRX / 2004-2016 STI

    $204.44
    COBB Coolant Overflow Tank - 2008-2014 Subaru WRX / STI

    9 In Stock

    800655

    COBB Coolant Overflow Tank - 2008-2014 Subaru WRX / STI

    $290.00
    IAG Coolant Expansion Tank Red - 2002-2007 Subaru WRX / STI

    IAG-ENG-5301RD

    IAG Coolant Expansion Tank Red - 2002-2007 Subaru WRX / STI

    $267.65
    IAG Coolant Expansion Tank Black - 2002-2007 Subaru WRX / STI

    IAG-ENG-5301BK

    IAG Coolant Expansion Tank Black - 2002-2007 Subaru WRX / STI

    $267.65

    86636VA030B5

    Subaru LH Washer Cover JDM (E8H) - 2015-2021 Subaru WRX / STI

    $37.73
    PERRIN 15-21 Subaru STI PERRIN Performance Coolant Overflow Tank

    ASM-ENG-502

    PERRIN 15-21 Subaru STI PERRIN Performance Coolant Overflow Tank

    $198.90
    Killer B Motorsport Dual Washer/Coolant Reservoir - 2002-2014 Subaru WRX / 2004-2021 STI

    DWR2-B

    Killer B Motorsport Dual Washer/Coolant Reservoir - 2002-2014 Subaru WRX / 2004-2021 STI

    $494.00
    CSF Filler Neck - 2013-2016 Scion FR-S / 2013-2024 Subaru BRZ / 2017-2019 Toyota 86 / 2022-2024 GR86

    8044

    CSF Filler Neck - 2013-2016 Scion FR-S / 2013-2024 Subaru BRZ / 2017-2019 Toyota 86 / 2022-2024 GR86

    $139.00
    Mishimoto Aluminum Coolant Overflow Tank - 2008-2021 Subaru WRX / STI

    8 In Stock

    MMRT-STI-08

    Mishimoto Aluminum Coolant Overflow Tank - 2008-2021 Subaru WRX / STI

    $253.99
    Mishimoto Subaru Aluminum Coolant Overflow Tank Black - Subaru WRX/STI 2008+

    9 In Stock

    MMRT-STI-08BK

    Mishimoto Subaru Aluminum Coolant Overflow Tank Black - Subaru WRX/STI 2008+

    $253.99
    COBB Tuning Subaru Coolant Overflow Tank - 2015-2021 Subaru WRX / STI

    30 In Stock

    800660

    COBB Tuning Subaru Coolant Overflow Tank - 2015-2021 Subaru WRX / STI

    $290.00
    Mishimoto Coolant Expansion Tank Black - 2014-2019 Ford Fiesta ST

    MMRT-FIST-14EBK

    Mishimoto Coolant Expansion Tank Black - 2014-2019 Ford Fiesta ST

    $264.53
    Mishimoto Aluminum Coolant Expansion Tank Black - 2017-2020 Honda Civic Type R

    10 In Stock

    MMRT-CTR-17EMWBK

    Mishimoto Aluminum Coolant Expansion Tank Black - 2017-2020 Honda Civic Type R

    $350.96
    Mishimoto Aluminum Coolant Expansion Tank Red - 2017-2020 Honda Civic Type R

    2 In Stock

    MMRT-CTR-17EMWRD

    Mishimoto Aluminum Coolant Expansion Tank Red - 2017-2020 Honda Civic Type R

    $350.96
    Mishimoto Coolant Expansion Tank Polished - 2014-2019 Ford Fiesta ST

    4 In Stock

    MMRT-FIST-14E

    Mishimoto Coolant Expansion Tank Polished - 2014-2019 Ford Fiesta ST

    $264.53
    Mishimoto Aluminum Overflow Tank Polished - 2013-2021 Scion FR-S / Subaru BRZ / Toyota 86

    MMRT-BRZ-13P

    Mishimoto Aluminum Overflow Tank Polished - 2013-2021 Scion FR-S / Subaru BRZ / Toyota 86

    $247.67

    Page 1 of 2

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    Koyo Aluminum Racing Radiator Manual Transmission - 2003-2007 Subaru WRX / STI

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    Koyo Aluminum Racing Radiator Manual Transmission - 2003-2007 Subaru WRX / STI

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    COBB Tuning Accessport V3 - 2015-2021 Subaru WRX / STI / 2014-2018 Forester XT

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    Cusco Front Strut Tower Bar Type OS - 2002-2005 Subaru WRX / STI

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    GrimmSpeed Boost Control Solenoid - 2008-2021 Subaru STI

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    GrimmSpeed Boost Control Solenoid - 2008-2021 Subaru STI

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    COBB Tuning 15MM Blue Urethane Exhaust Hanger Standard Length - Subaru Models (inc. 1993-2007 Impreza / WRX / STI)

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    COBB Tuning 15MM Blue Urethane Exhaust Hanger Standard Length - Subaru Models (inc. 1993-2007 Impreza / WRX / STI)

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    Mishimoto Silicone Elbow 90 Degree 2in Black - Universal

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    Hella Horns with Grimmspeed Brotie Mounting Bracket - 2002-2021 Subaru WRX / STI

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    Hella Horns with Grimmspeed Brotie Mounting Bracket - 2002-2021 Subaru WRX / STI

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    GrimmSpeed Radiator Shroud w/ Tool Tray Black - 2002-2007 Subaru WRX/STI

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    ProSport Oil Galley Plug 1/8NPT - Subaru Models (inc. 2004+ WRX/STI)

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    ProSport Oil Galley Plug 1/8NPT - Subaru Models (inc. 2004+ WRX/STI)

    4.4(10)
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