The Radium Direct Mount Regulator (DMR) is a compact high peformance adjustable EFI fuel pressure regulator designed with a unique highly versatile mounting system. It can be mounted directly to a compatible fuel rail port using the included 360 degree swiveling adapter, or mounted remotely away from the fuel rail. The compact size fits in areas with limited space, without sacrificing performance. This regulator is safe to use with E85 and other alternative fuels. Part numbers 20-0623-00 include only the parts shown in the photo below. Fuel Pressure Regulator (Black) -Swiveling Inlet Adapter Fitting (for 8AN ORB Fuel Rail) -PTFE Impregenated 1/8 NPT Plugs (x2) -6AN Male Swivel (for Return Line) -Return Orifices (silver orifice pre-installed).