Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Radiator Caps

Top of your radiator with a new radiator cap from Speedway Motors! No matter if you're looking for fashion or function, we've got you covered with beautiful chrome, stainless and brass caps, as well as, stock steel caps. We carry radiator caps from the cooler leaders like AFCO, C&R Radiators and Mr Gasket, so you can rest easy knowing you're getting the best cap possible. No matter what pressure rating you need, you can be we'll have it in stock and ready to ship today!

"Oval Track, Radiator Caps" Page 1 of 1

  • High Pressure Radiator Cap, 22-24 Lbs
    High Pressure Radiator Cap, 22-24 Lbs
    (Part #91015622)
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    A must have when racing! High pressure cap for radiators raises boiling point of water.

    Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles

  • Stant 10372 High Pressure Racing Radiator Cap, 21-25 Lbs
    Stant 10372 High Pressure Racing Radiator Cap, 21-25 Lbs
    (Part #91015706)
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    Used by all the top NASCAR teams. The best high pressure radiator caps you can buy!

    Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles

  • Garage Sale - Mr Gasket Import Thermocap Radiator Cap
    Garage Sale
    Garage Sale - Mr Gasket Import Thermocap Radiator Cap
    (Part #5502472S)
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    • Available for import applications only
    • Built-in thermometer indicates coolant temperature
    • Calibrated in Fahrenheit and centigrade
    • 30° to 270° F range
    • Color-coded temperature ranges
    • Integrated coolant reclamation valve
    • Helps prevent coolant burn injuries
    • Chrome crown with colored trim ring
    • Improves appearance under hood

    These caps are garage sale priced because they are different than what we currently offer.

     

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

     

  • Stant Radiator Cap - 21-25 Lbs
    Stant Radiator Cap - 21-25 Lbs
    (Part #10680153)
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    Quality radiator caps help prevent the loss of coolant that can lead to over heating.

    Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles.  

  • Speedway 16 Lb. Thermocap Radiator Cap
    Speedway 16 Lb. Thermocap Radiator Cap
    (Part #91015616)
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    The built-in calibrated thermometer on this chrome-plated 16 lb. radiator cap makes it easy to check your coolant temp - and to know when its safe to remove the cap. Fits radiators on most domestic vehicles.

    • Helps to prevent burn injuries
    • Integrated coolant reclamation valve works great with your coolant recovery system
    • Your radiator can reclaim coolant from your overflow bottle
    • Wide 30° to 270° F temperature range
    • Calibrated in centigrade and Fahrenheit
    • Color-coded temperature ranges
    • Chromed crown with a colored trim ring

    Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles

  • Safety Locking Radiator Cap - 28-32 Lbs.
    Safety Locking Radiator Cap - 28-32 Lbs.
    (Part #91015728)
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    This safety lock cap for radiators is designed for high pressure, 28-32 lbs.  Provision to release pressure, taking the danger away from checking your race high pressure system.  High pressure cap raises boiling point of water.

    Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles

  • Speedway High Pressure Radiator Cap, 29-31 Lbs
    Speedway High Pressure Radiator Cap, 29-31 Lbs
    (Part #91015628)
    x
                

    A must have when racing! High pressure cap for radiators raises boiling point of water.

    Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles.

  • Stant 10393 High Pressure Racing Radiator Cap, 28-32 Lbs
    Stant 10393 High Pressure Racing Radiator Cap, 28-32 Lbs
    (Part #91015707)
    x
                

    Used by all the top NASCAR teams. The best high pressure radiator caps you can buy!

    Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles

  • AFCO High Pressure Radiator Cap: 29-31 lbs.
    AFCO High Pressure Radiator Cap: 29-31 lbs.
    (Part #10680050)
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    AFCO high pressure radiator cap for 29-31 lbs. The best cap you can buy!

    Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles

  • MotoRad Radiator Cap - 20 Lbs.
    MotoRad Radiator Cap - 20 Lbs.
    (Part #10680151)
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    Quality radiator caps help prevent the loss of coolant that can lead to over heating.

    Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles.  

  • High Pressure Radiator Cap, 20 Lbs
    High Pressure Radiator Cap, 20 Lbs
    (Part #91015620)
    x
                

    A must have when racing! High pressure cap for radiators raises boiling point of water.

    Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles