Welcome to Import blowout Sales. FUELAB FUEL PRESSURE REGULATOR -10AN FPR 51501-6 GREEN. PART NUMBER: 51501-6 (GREEN). 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 515 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.