Radium Engineering 99-05 Mazda MX-5 RA-Series Fuel Pressure Regulator Kit

The Radium Engineering 99-05 Mazda MX-5 RA-Series Fuel Pressure Regulator Kit is designed so it controls EFI fuel pressure and returns excess fuel so injectors see a stable, tunable pressure supply. Radium regulators are intended for performance return-style systems where consistent pressure control is important as fuel demand and manifold pressure change.

This version is designed around 99-05 Mazda MX-5 RA-Series, so the mounting, routing, or connection details should be checked against that application before installation. A fuel return must be routed back to the tank or surge tank. Match regulator port sizes and pressure range to the fuel-system design.