Radium Coolant Expansion Tank Lotus Elise Exige Oem Location Poncams and center ports use 8AN

and center ports use 8AN ORB (3/4"-16 O-ring threads) to accept many adapter fittings for custom high flow fuel system builds

The standard valves are often not up to the task of eliminating damaging compressor surge

compatible with Walbro F90000274 style fuel pumps nternal harness use twin 16 AWG ETFE insulated wires

This port is thread tapped for 6AN ORB (9/16"-18)

Designed for the Honda S2000 AP1

Radium Coolant Expansion Tank Lotus Elise Exige Oem Location Poncams and center ports use 8ANRadium Engineering S2 Lotus Elise, Lotus Exige, and Lotus 2 Eleven comes standard with a Denso coolant expansion tank. This is the same plastic tank that is found in the Toyota 2ZZ GE equipped vehicles. For fitment, Lotus designed a complex bracket that incorporates a mount for the electric hot soak water pump. There has been cases reported where the Denso tank has failed and owners have found that new replacements are quite expensive. Radium has