Designed to match Performer Series carburetors, Edelbrock's High-Performance Street Fuel Pumps have six valves and a flow capacity of 110 gallons per hour. The unique valve design improves flow quantity and quality, and will support engines up to 550 hp. High volume, 3/8in NPT inlet and outlet surpasses the capacity of conventional models. Produces 6 psi which is correct fuel pressure for street. For gasoline or mixed fuels only.