The Honda Civic Type R Fk8 Radium Coolant Tank is CNC machined from 2 piece aluminium. Because of continuous & intense heat cycling, plastic coolant tanks have a reputation of failing over time. Aluminium is also a superior thermal conductor and so heat transfer is further improved. All aluminium parts are anodized to improve durability. This Radium Type R Fk8 coolant kit directly replaces the plastic Honda tank without making a permanent modification 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 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 de-aerating the system. The coolant tank is the same capacity as the OEM plastic tank, resulting in no coolant loss. This Honda Civic Type R Fk8 Radium Coolant Tank comes with all the parts needed for installation.