Radium Engineering’s fuel pressure regulator and filter kit for the E46 M3 allows a plug-and-play conversion to one of Radium’s stunning RA-Series FPRs and filters.

Kit comes complete with everything needed for install. High-flow, adjustable fuel pressure regulator and a choice of Stainless and state-of-the-art Microglass filters – for more information about Radium fuel filters, see here.

To aid in adjusting pressure, the RA-Series regulators feature incremental detents that provide haptic feedback to the user. Every detent permits 1psi (+/-0.5psi) of adjustment depending on current fuel pressure. They also feature a 360 degree swivelling vacuum reference port that is double O-ring sealed. This is the first in the industry. It permits the installer to quickly point the vacuum fitting in any direction with no tools required.

This kit is suitable with all gasoline types including unleaded, leaded, oxygenated, and pre-mixes. Furthermore, it is compatible with alcohol blends of fuel including methanol, ethanol, and E85.

This kit will fit the E46 M3 as well as S54-engined Z4 M models. All necessary hardware and adapter fittings are included. Installation instructions here.