JEGS Ultra-Quiet Electric Fuel Pumps feature a composite impeller, billet base, mounting bracket w/ cushion, pressure adjustment screw and a washable screen type inlet filter. The 120 GPH pump can handle engines up to 600 HP and the fuel pressure is preset at 6.5 PSI so it doesn't require a regulator. The 160 GPH pump can handle engines up to 1,000 HP and the fuel pressure is preset at 12 PSI which requires the use of a regulator (sold separately) such as 555-15907. Designed for use with gasoline and carburetors (not for EFI). Made in USA.