Holley Mighty Mite pumps are suited for tough, hard-working applications. From truck refrigeration units, marine generators, and gasoline and diesel industrial applications, these pumps have the proven performance, quality, and dependability that you can count on. They are self-priming and self-regulating at 9-11.5 psi and can deliver 33 GPH. Compatible with all types of fuels and additives, these pumps are the answer for your needs. Rugged solid state design pumps are a simple two wire hook-up and made in the USA. A regulator may be needed for carbureted applications requiring less fuel pressure. We recommend the Holley 12-803 or 12-804 fuel pressure regulator.