The gasoline Stage 1 System kit is very versitile. It can be used in naturally aspirated or forced induction applications. The system includes an adjustable boost activated switch for forced induction applications as well as a Wide Open Throttle switch for naturally aspirated applications. Operation is very simple: the system starts injecting when the boost or WOT switch is activated and it injects a fixed amount of fluid through the nozzle until the switch opens again. This makes it a good choice for low to medium horsepower setups looking for an octane enhancement and cooler intake charge. System includes: UHO (Ultra High Output) pump, 3-quart reservoir, nozzles to cover a wide range of horsepower, WOT (wide open throttle) switch, boost activated switch, required hardware needed for installation, comprehensive instructions.