These state-of-the-art electric fuel pumps offer maximum performance in a compact package. With anodized aluminum housings and high-quality internals, they are both strong and durable. Each pump is factory-tested and includes mounting brackets. The carbon vanes and composite rotor give these pumps the added boost for maximum performance. The high quality construction results in a pump that is 4 to 14 dB quieter than competitors' pumps at the same pressure. #1791 is factory preset to 6.5 psi and no regulator is required. With a replaceable screen type inlet filter and the free flow rate of 120 GPH it is sufficient to supply 480 hp. #1792 has a free flow rate of 160 GPH, enough to feed a 1000 hp engine. This pump is factory preset to 12 psi and requires an external regulator such as the Edelbrock regulator #1727. Warranty will be voided when used with diesel fuel. ** These pumps should be mounted as close to the fuel tank as possible, at or below the fuel level. For proper installation and voltage requirements, use fuel pump relay kit #1795. All fuel pumps are for gasoline only. Edelbrock offers rebuilding services for Quiet-Flo fuel pumps - call for more information.