FSE Sytec Racing Adjustable Fuel Pressure RegulatorRACE USE ONLY8mm Unions(RPR001)This is a special constant pressure model which is unsuitable for road use. This unit has beenspecifically designed for racing cars (only) where the E.C.U. has been programmed for optimum performance while the regulators job is to maintain a constant high pressure in the fuel rail. Pressure range is 1.5-6 BarThese regulators are designed to work at pressures which are unacceptable for road cars.