Welcome to extrame psi parts! Fuelab Fuel Pressure Regulator 51502 FPR -6AN 51502-2 RED. All FUELAB 51502 Series Fuel Pressure Regulators Feature. Precision pressure adjustment hardware. 1/8 NPT gauge port (for external pressure gauge, plug supplied). 1/8 NPT pressure reference port with supplied barbed fitting. 6AN return line port. All stainless steel hardware. Long life […]