Radium FPR and Fuel Filter Kit, BMW E46 M3The Radium Engineering 20 0932 FPR and Fuel Filter Kit is an OEM fuel filter replacement and fuel pressure regulator solution for the BMW E46 M3. Designed to replace the factory fuel filter with a larger, less restrictive unit, this kit reduces stress on the fuel pump by lowering pre filter pressure resulting in less current draw, lower fuel temperatures, and increased fuel flow capacity. Two selectable filter elements are available: a 10 Micron