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  • RAD18-0076-A11

    Radium Engineering High Pressure Radiator Cap

    WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov

    Request Price Match

    Usually Ships in 3-5 Business Days

    The radiator cap is an essential part of an upgraded cooling system. Radium caps are engineered to safely improve cooling efficiency by managing the boiling temperature. A higher radiator pressure effectively raises the coolant boiling point, providing an extra safety margin and preventing air pocket cavitation at the water pump. 

    NOTE: Traditionally, "radiator" caps are mounted to the radiator but can also be found on coolant expansion tanks (below).

    Each OEM replacement radiator cap is manufactured from stamped stainless steel for durability. All 18-0076-X1X radiator caps are electroplated black.


    Unlike OEM caps which use natural rubber gaskets, these radiator caps feature premium silicone sealing elements for long lasting durability. 


    PRESSURE
    Available with 3 different pressure relief springs:

    1. 1.1Bar (16.0psi)
    2. 1.3Bar (18.9psi)
    3. 1.5Bar (21.8psi)


    TYPES
    Radium radiator caps are designed for mini size (32mm ID) radiator necks only. Available in 2 common styles (Type-A and Type-B).

    Please confirm what style your application uses prior to ordering. NOTE: As shown below, Radium Engineering coolant expansion tanks require a Type-A style radiator cap.


    COMPATIBILITY

    Below are popular vehicles with their respective radiator cap style used from the factory. NOTE: there are many vehicles not listed below.

    Type-A

    1990-1993 Acura Integra
    1991-2005 Acura NSX

    1990-1993 Honda Accord
    1988-1991 Honda Civic
    2016-up Honda Civic
    1988-1991 Honda CRX 
    1992-2001 Honda Prelude

    2003-2008 Infiniti G35
    2008-2013 Infiniti G37
    2014-up Infiniti Q50
    2014-up Infiniti Q60

    1992-2000 Lexus SC400

    1990-1995 Mazda Cosmo
    1989-2005 Mazda Miata
    2006-up Mazda MX-5
    1986-2002 Mazda RX-7
    2004-2011 Mazda RX-8

    1991-1999 Mitsubishi 3000GT
    1990-1999 Mitsubishi Eclipse
    2002-up Mitsubishi Lancer/EVO

    1989-1998 Nissan 180SX
    1989-1998 Nissan 200SX
    1989-1998 Nissan 240SX
    1990-1996 Nissan 300ZX
    2003-2009 Nissan 350Z
    2009-up Nissan 370Z
    1988-1994 Nissan Cefiro
    2005-up Nissan Frontier
    2009-up Nissan GT-R
    1989-2002 Nissan Laurel
    1989-2002 Nissan Silvia
    1989-up Nissan Skyline

    2005-2006 Saab 9-2X

    1997-up Subaru Forester
    1993-up Subaru Impreza
    1990-up Subaru Legacy
    1991-1997 Subaru SVX
    2015-up Subaru WRX STi
    2015-up Subaru WRX

    1982-1995 Toyota Celica
    1985-1995 Toyota MR2
    1986-1992 Toyota Supra 

    Radium Coolant Expansion Tank 

    Type-B

    1994-2001 Acura Integra
    2002-2006 Acura RSX
    2004-2008 Acura TSX

    1998-2016 Chevrolet Tracker
    1989-1997 Geo Tracker

    1994-1997 Honda Accord
    1992-2015 Honda Civic
    1993-1997 Honda Del Sol 
    2003-2011 Honda Element
    2007-up Honda Fit 
    2000-2009 Honda S2000

    2005-up Lexus GS350
    1998-up Lexus IS300
    2005-up Lexus IS350
    2008-up Lexus LX570
    2015-up Lexus RC350

    2012-2016 Scion FR-S

    2012-up Subaru BRZ

    1989-1999 Suzuki Swift

    1996-up Toyota 4Runner
    2012-2021 Toyota 86
    1989-up Toyota Camry
    1993-2017 Toyota Corolla
    2003-up Toyota FJ Cruiser
    2022-up Toyota GR86
    2008-up Toyota Land Cruiser
    2008-up Toyota Sequoia
    1993-2002 Toyota Supra
    1995-up Toyota Tacoma 
    2007-up Toyota Tundra 


    SPECIFICATIONS
    Material: Stainless Steel
    Sealing Gaskets: Silicone
    Pressure: 1.1, 1.3, 1.5 Bar
    Design Structure: Type-A, Type-B
    Construction: Metal Stamping
    Surface Finish: Black Electroplate