GRM1.1013.1.BLK

    GrimmSpeed 1.3 Bar Radiator Cap - Subaru Universal

    $25.00

    Payin full orin 4 interest-free installmentsof$6.25.

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    Manufacturer's Warranty: This part is new and carries a full manufacturer warranty. See manufacturer's website for additional details.

    Product Description

    GRM1.1013.1.BLK

    GrimmSpeed 1.3 Bar Radiator Cap

    Features:

    • Raises system pressure to 1.3 Bar for improved cooling efficiency

    • Helps prevent coolant overflow during track or spirited driving

    • Ideal for use with distilled water or water/antifreeze blends

    • Increases boiling point to maintain stable engine temps

    • Direct replacement for factory 1.1 Bar radiator cap

    • Durable construction with upgraded materials

    • Affordable performance upgrade

    • Adds a clean, functional touch to your engine bay

     

    Improved Cooling for Performance Applications
    When pushing your Subaru beyond everyday driving—such as during spirited runs or track use—coolant efficiency becomes critical. While the stock 1.1 Bar (16 PSI) radiator cap is sufficient for daily driving, it can fall short when using high-performance coolant blends like water or antifreeze/water mixtures. These fluids offer better heat transfer but boil at lower temperatures, often causing overflow during heavy use. Raising the system’s pressure rating increases the boiling point, helping to maintain optimal temperatures and prevent fluid loss under stress.

     

    GrimmSpeed’s High-Pressure Solution
    The GrimmSpeed 1.3 Bar Radiator Cap is a simple yet effective upgrade for enhancing your cooling system’s performance. By increasing pressure tolerance, it reduces the risk of overflow and maintains proper coolant levels in demanding conditions. This cap is engineered for reliability and durability, making it ideal for both track cars and daily drivers alike. As a bonus, its sleek design also adds a clean, professional look to your engine bay—an excellent value for performance and appearance.

     

    Quick Specs:

    • 1.3 Bar/18.9 PSI Pressure Rated
    • Increases Cooling System Efficiency
    • Electro-coated Stamped Steel Construction
    • Heavy-Duty Silicone Seal
    • Understated Look Eliminates Ugly OEM Yellow Badge
    • Manufactured in Japan

     

    Fitments:

    • All Subaru Radiators and/or Expansion Tanks
    • Many (but not all) Nissan, Mitsubishi, Honda, Mazda, and Toyota Models

    *fitment note - not suited to replace the 1-way "earless" cap on the STI radiators, but will work perfectly on the upper expansion tank!