NOS is now offering a new black version of its Cheater wet nitrous system is designed for use on 350 CID or larger engines with 4500-style intake manifolds. This system uses large Cheater nitrous and fuel solenoids allowing adjustment to any desired power level from 150 to 250 horsepower in a matter of seconds. NOS Cheater systems are easy to install and utilize a ½ inch thick injector plate which fits between the carburetor and intake manifold to provide ample hood clearance. NOS Cheater systems include everything needed including 6AN feed line, one ½ inch aluminum injector plate, black 10 lb bottle, solenoids, hardware, and instructions to complete the installation.. ** 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 per 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. Incl. 1/2 in. Thick Alum. Plate Offering Exc. Nitrous/Fuel Distr Designed For 4500 Dominator Flange Opening Adjustable From 150-250 Horsepower Incl. Jetting For 150/180/210/250 Horsepower Wet System Provides Exceptionally Smooth Power Delivery Bottle Is Made From 6061-T6 Aluminum Incl. 10 lb. Black Nitrous Bottle w/Brackets Incl. Mounting Hardware and Instructions Additional Attributes: GTIN: 00090127048122 Bottle Included: Yes Type: Holley DOMINATOR Flange Usage: Strip/Competition WARNING CA Proposition 65: Yes WARNING CA Proposition 65 Message: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov Packaging: Quantity of Each: Package UOM: Dimension: 25.0000 x 10.0000 x 10.0000 inches