Welcome to Import blowout Sales. FUEL LAB FUEL PRESSURE REGULATOR -6AN FPR 51502-1 BLACK. 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 PSID to fuel injected applications up to 125 PSID. The 525 Series has its return port in-line with the inlet port (not on the bottom) which allows for easy installation in extremely tight locations. 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.