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Radiator Caps & Filler Necks

Ace Race Parts offers 6061 aluminum radiator filler neck replacements in two common sizes, Small and Large, along with a Koyo and Mishimoto brand high-pressure radiator caps. Each radiator filler neck is precision CNC machined from billet 6061 aluminum and features a two piece threaded design. Available in small and... Read More
  • Weld On Radiator Filler Neck - Small - Ace Race Parts

    Weld On Radiator Filler Neck - Small (1.250" ID, 0.750" Outlet) - 6061 Aluminum

    SKU 17001
    $ 21.95 - $ 21.95
    $ 21.95
    $ 21.95 - $ 21.95
    $ 21.95
    25+ in stock

    Ace Race Parts offers Weld On Radiator Filler Necks that are precision CNC machined from solid 6061 Aluminum billet and come with a 1/16" NPT x 1/4...

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  • Weld On Radiator Filler Neck - Large - Ace Race Parts

    Weld On Radiator Filler Neck - Large (1.650" ID, 1.092" Outlet) - 6061 Aluminum

    SKU 17002
    $ 22.95 - $ 22.95
    $ 22.95
    $ 22.95 - $ 22.95
    $ 22.95
    25+ in stock

    Ace Race Parts offers Weld On Radiator Filler Necks that are precision CNC machined from solid 6061 Aluminum billet and come with a 1/16" NPT x 1/4...

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  • Mishimoto High Pressure Radiator Cap 1.3 Bar - Small (MMRC-13-SM) - Ace Race Parts

    Mishimoto High Pressure Radiator Cap 1.3 Bar - Small (MMRC-13-SM)

    SKU MMRC-13-SM
    $ 0.00 - $ 0.00
    $ 0.00
    $ 24.95
    $ 24.95 - $ 24.95
    $ 24.95
    Only 5 left!

    Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becom...

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  • Mishimoto High Pressure Radiator Cap 2.0 Bar - Small (MMRC-20-SM) - Ace Race Parts
    Sold out

    Mishimoto High Pressure Radiator Cap 2.0 Bar - Small (MMRC-20-SM)

    SKU MMRC-20-SM
    $ 24.95 - $ 24.95
    $ 24.95
    $ 24.95 - $ 24.95
    $ 24.95
    Out of stock

    Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becom...

    View full details
  • Mishimoto High Pressure Radiator Cap 1.3 Bar - Large (MMRC-13L) - Ace Race Parts

    Mishimoto High Pressure Radiator Cap 1.3 Bar - Large (MMRC-13L)

    SKU MMRC-13L
    $ 24.95 - $ 24.95
    $ 24.95
    $ 24.95 - $ 24.95
    $ 24.95
    Only 6 left!

    Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becom...

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  • Koyo 1.3 Bar High Pressure Radiator Cap - Red (SK-C13) - Ace Race Parts
    Save 20% Save %

    Koyo 1.3 Bar High Pressure Radiator Cap - Red (SK-C13)

    SKU SK-C13
    $ 49.20
    $ 49.20 - $ 49.20
    $ 49.20
    $ 39.20
    $ 39.20 - $ 39.20
    $ 39.20
    Only 6 left!

    Can you handle the pressure? The Koyorad hyper Radiator Cap is for intelligent tuners who demand to extract every ounce of cooling efficiency from ...

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