Dominator Twin-Pump External Fuel Pump

The Holley Dominator 12-1800 is a high-performance external in-line fuel pump engineered for demanding applications, including those with nitrous or forced induction that also see street duty. Its innovative, patent-pending twin-pump design offers a unique staging capability, allowing one pump to operate for normal cruising and both to engage when activating power adders such as nitrous or boost. This staged approach significantly reduces unnecessary fuel recirculation and heating, which can lead to performance issues and hot fuel problems. Constructed from billet aluminum, the Dominator pump is built for durability and boasts an attractive black anodized finish. It features 10 AN O-ring inlet and outlet ports for superior sealing and high flow. The pump is compatible with both carbureted and EFI systems and can be fully submersible for custom in-tank applications, saving space and simplifying plumbing. It operates effectively with voltage inputs ranging from 12V to 18.5V, making it suitable for both street and race environments. The pump is rated for gasoline and diesel fuels. It is important to note that these pumps do not have an internal bypass. Therefore, a bypass-style fuel pressure regulator and a return line are required for proper operation. Additionally, this specific Holley Dominator fuel pump is not designed for use with methanol and will not work with E-85 or diesel fuels. The compact size and lightweight (5.1 lbs) design facilitate installation in tight spaces.