Welcome to Import blowout Sales. FUELAB FUEL PRESSURE REGULATOR -6AN FPR 51502-1 BLACK. PART NUMBER: 51502-1 (BLACK). FUELABT 515 Series Fuel Pressure Regulators are designed with performance and flexibility in mind. They accept port style and non-port style union fittings without interference. Several configurations are available, supporting carbureted applications as low as 1 PSI to fuel injected applications up to 125 PSI. The 515 Series Fuel Pressure Regulator has a -6AN return port located on the bottom. All of our products are 100% brand new unless otherwise stated in the description above. Please inspect your order upon receipt. We strive to offer our customers with professional service & satisfaction! Safe & Secure Payments by.