COMPATIBILITY

• All Radium Coolant Expansion Tanks
• Tanks & Radiators that accept 32mm mini Type-A radiator caps (see more below)

OVERVIEW

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.

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:

1.1Bar (16.0psi)
1.3Bar (18.9psi)
1.5Bar (21.8psi)

CAP TYPES

Radium radiator caps are designed for mini size (32mm ID) radiator necks only. Available in Type-A. We no longer offer Type-B.

Please confirm what style your application uses prior to ordering.

NOTE: All Radium Engineering coolant expansion tanks require a Type-A style radiator cap.

TYPE-A APPLICATIONS

• Radium Coolant Expansion Tank (all kits)
  
  
• 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
• 1996-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  

SPECIFICATIONS

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