Nitrous Oxide System - NOS Cheater Nitrous System Holley 4500 Dominator Carb Spray Plate (02002NOS)Single 4500 Series Dominator Flange Carburetor To supply the proper amount of fuel to the carburetor and Cheater System, a fuel pump must be used that is designed to operate between 5 and 10 PSI, with a flow rate of 0. 1 gallons per hour horsepower at 6 PSI. For example, an engine that produces 450 horsepower when the Cheater System is activated will require a fuel pump that flows at least 45 gallons per hour at 6 PSI. Tech Notes: Forged pistons are