Radium Coolant Expansion Tank OEM location - Elise/Exige 06-11 (2ZZ-GE)Direct OEM replacement coolant expansion tank engineered by Radium Engineering for Lotus Elise and Exige (2006 2011) with 2ZZ GE engines. This CNC machined billet aluminum tank mounts in the factory location, replacing the restrictive plastic reservoir with a professional grade cooling solution designed for high performance applications. Compatibility Lotus Elise (2006 2011) with 2ZZ GE engine Lotus Exige (2006 2011) with 2ZZ GE engine Key Features