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
    When your Subaru is pushed beyond standard commuting—such as during aggressive driving or track events—maintaining stable engine temperatures becomes essential. The factory 1.1 Bar (16 PSI) radiator cap performs adequately for daily use, but it may fall short when running performance-oriented coolant blends like distilled water or water/antifreeze mixtures. These blends offer improved thermal conductivity but lower boiling points, increasing the risk of coolant overflow under high heat. By raising system pressure, you effectively elevate the boiling point, allowing the cooling system to operate more efficiently and reliably under load.

    GrimmSpeed 1.3 Bar Radiator Cap: Simple, Effective Upgrade
    The GrimmSpeed High-Pressure Radiator Cap is a cost-effective solution to improve your vehicle’s cooling performance. Rated at 1.3 Bar, this upgraded cap ensures better containment of coolant, reducing the chance of overflow and keeping temperatures in check during extended performance use. Precision-built for durability, it not only enhances reliability but also adds a polished look under the hood—making it an excellent choice for both function and style-conscious Subaru owners.

     

    DETAILS:

    • Increases cooling system pressure to 1.3 Bar for enhanced performance

    • Reduces risk of coolant overflow under high heat or track conditions

    • Ideal for vehicles running water or water/coolant mixtures

    • Raises boiling point for better temperature stability

    • Direct swap for OEM 1.1 Bar radiator caps

    • Built with durable, high-quality components

    • Budget-friendly cooling upgrade

    • Sleek, functional addition to your engine bay

     

    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!