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1. Holley offers a wide variety of pumps in its HP billet line for varying applications. The 12-700 model that Holley sent us, like all of its pumps, utilizes OEM-style gerotor technology that yields lightweight design, quiet operation, and 100,000-plus-mile durability. The pumps can be used in fuel injected or carbureted applications, and are compatible with gasoline or diesel fuels. They’re also fully submersible for use in custom in-tank applications. With no internal bypass, you will need to use a regulator and a return line. Part number 12-700 retails for a little over $270.