DESIGNED FOR 4150 style carburetors, including HP Series carbs and main bodies, Proform carbs and main bodies, and Quick Fuel Technology Q & P Series carbs BRACKET WILL WORK WITH standard and aftermarket adjustable secondary arms NOTE: bracket does not fit Proform Lightweight Aluminum carbs and main bodies MADE IN USA with high quality components and assembly SPECIFICATIONS: 15.1 Amps @ 125/250VAC Billet Nitrous Switch Kit4150/4150HP Series Carburetors15.1 Amps @ 125/250VACMade in the USA Designed for 4150 style carburetors (e.g. Holley® HP Series carbs and main bodies, Proform carbs and main bodies, and Quick Fuel Technology Q & P Series carb)Bracket will work with standard and aftermarket adjustable secondary armsBracket does not fit Proform Lightweight Aluminum carbs and main bodies