Holley Dominator billet fuel pumps feature a patent-pending twin-pump design. It allows you to use one pump for cruising and both pumps when you activate the nitrous switch or start building boost. By staging the second pump, you eliminate the unnecessary recirculation and heating of extra fuel, which can lead to poor performance and hot fuel issues. They can also be wired for full-time duty to get the maximum performance and are proven with an 18 V compatibility at pressures of up to 80 psi. At only 5.1 lbs., they weigh half a pound less than other 1,000 hp pumps, and yet they have twice the features.