Radium Engineering Coolant Tank Kit - 2017+ Honda Civic Type-R FK8, FL5, 23+ Integra Type-S - 20-0827OVERVIEW 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 and anodized for increased longevity. And because aluminum is a superior thermal conductor material, heat transfer is further improved. Additionally, the metal construction is robust enough to use in racing applications. This coolant expansion