RADIUM COOLANT TANK KIT HONDA CIVIC TYPE R FK8 17+Radium Engineering coolant tank kit for Civic Fk8 17+. Because of continuous and intense heat cycling, plastic coolant tanks have a reputation of failing over time. 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 is robust enough to use in a racing application. This FK8 Type