NOS NOS Powershot nitrous oxide systems are an excellent way to increase the horsepower of your engine. They use a thin, 1/2 in. injector plate that fits between your intake and carburetor. Highly accurate spray bars within the plate simultaneously inject both nitrous and fuel into the manifold, creating a smooth rush of extra power on demand. They're easy to install and are factory-preset to provide 125 hp for V8 applications or 90 hp for V6s.