Radium Engineering RA-Series FPR Conversion KitOVERVIEW This kit permits all previous Radium Engineering adjustable fuel pressure regulators to be converted to an RA Series FPR. This will add all of the newest features as well as performance enhancements to older regulators. FUEL PRESSURE ADJUSTMENT RA series regulators feature the first tool less pressure adjustment. A jam nut and set screw are no longer required. With a simple turn of the knob, pressure will be increased or decreased. To aid in