Radium Coolant Expansion Tank Kit, Honda Civic Type R (FK8 / FL5)The Radium Engineering 20 0827 Coolant Expansion Tank Kit is a direct OEM replacement coolant tank for the Honda Civic Type R (FK8 and FL5). CNC machined from 2 piece billet aluminium and anodised for long term durability, this tank eliminates the failure prone OEM plastic unit a known weak point on performance and track driven Type R builds. Aluminium's superior thermal conductivity improves heat transfer compared to the factory plastic tank, while