Adjustable performance in a bottle. Edelbrock EFI nitrous systems give you large, adjustable horsepower gains in your choice of wet or dry approaches. Wet systems send a mixture of nitrous and essential enriching fuel into the intake runner, and allow you to select boost from 50 to 70 HP. Dry systems also introduce the nitrous into the intake, but the enriching fuel is supplied by either increasing the fuel pressure or changing the duty cycle, for power gains from 40 to 150 HP. Both types include the bottle (empty), solenoids, switches, fittings, stainless braided hose, and all hardware needed for installation.