Radium Engineering Coolant Tank Kit (17+ Civic Type-R)

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SKU: RAD20-0427

$ 322.95 $ 339.95

Radium Engineering Coolant Tank Kit (17+ Civic Type-R)

Because of continuous and intense heat cycles over time, plastic coolant tanks have a reputation of failing. Fortunately, the rugged 2-piece Radium Engineering replacement is CNC machined from aluminum. An because aluminum is a superior thermal conductor material, heat transfer is further improved. Additionally, the metal construction resists high coolant pressures commonly associated with race engines.

This FK8 Type-R kit directly replaces the plastic Honda tank without making permanent modifications to the vehicle. A specially designed mounting bracket secures to existing threaded holes and Radium adapter fittings interface with the factory lines. The tank functionality remains the same as the OEM cooling system.

The Radium Engineering Coolant Expansion Tank has proved itself over the years in many applications all over the world, in race and street vehicles. The tank is CNC machined from aluminum consisting of two halves that are bolted together. Parts are anodized increasing longevity.

The internal volume of the Radium Engineering Coolant Expansion Tank is equivalent to the OEM tank resulting in no coolant loss. The internal design features two chambers that are NOT isolated from each other with cross-over passages at the top and bottom. The coolant tank also has an internal swirl feature aiding in deaerating the system.


  • 2-Piece Billet Aluminum Tank
  • Aluminum Mounting Bracket
  • Aluminum Adapter Fittings
  • Heater Hose, 5/16"
  • Overflow Hose, 7/32"
  • Stainless Steel Hardware

Please Note: The kit includes all parts necessary for installation. The OEM 1.3 Bar Honda pressure cap can be re-used. Alternatively, the Radium Engineering Type-A cap is compatible as well.


  • 2017+ Honda Civic Type-R FK8

What's In The Box?

  • 1 - Radium Coolant Tank
  • Hoses and Fittings
  • Mounting Bracket and Hardware



  • Manufacturer Standard Warranty

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