Fuelab 545 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 TBI applications as low as 10 PSI to fuel injected applications up to 125 PSI. The return port is in-line with the inlet port (not on the bottom) which allows for easy installation in extremely tight locations. Fuelab 545 Series Fuel Pressure Regulators have all the same great features as the 525 series, only smaller and weigh 50% less!