Edelbrock Performer RPM II Single-Stage Nitrous System #70080 is designed for use on carbureted V8'S. It features Victor Pro fuel solenoids and Victor Pro bottom discharge nitrous solenoids for enhanced flow capacity. Power increases can be adjusted from 200-400+ horsepower. The 1/2" thick aluminum spray bar plate fits between the carburetor and the intake manifold and features stainless steel spray bars with more discharge holes than Performer RPM systems for more flow and superior atomization. This system is for use with square-bore carburetors.