An instant boost of up to 600 HP. Often times, the application of too much nitrous at the starting line can ruin a good launch. The NOS Dual Stage Big Shot nitrous systems are designed with this in mind. They inject nitrous oxide into your engine in two stages. The first stage allows you to leave the line with a moderate nitrous boost of up to 200 HP. Then, with the tires fully hooked up, the second stage is activated for a power boost of up to 400 HP more! The first stage is turned on by a throttle-activated microswitch, while the second stage is activated with a push button switch. The systems include two Cheater solenoids for the first stage, one Super ProShot and one Cheater nitrous solenoid for the second stage, an unfilled 10 lb. nitrous bottle, a 1/2 in. injector plate, filters, fittings, a variety of power jets, switches, aircraft-quality steel braided hose, and all other necessary hardware for a complete installation.