These AEM Electronics water/methanol injection kits allow you to increase boost pressure and advance timing without having to run higher-octane fuel. They include either a 1 gallon or 5 gallon reservoir with a fluid level sensor already installed. Also included is AEM Electronics Boost Safe output--this allows you to retard timing or reduce boost if the systems run out of fluid or detect an error. Once installed, the AEM water/methanol injection kits use a boost-dependent, variable-flow progressive controller to determine the amount of water/methanol mixture to feed into the inlet stream from the reservoir. Adjustments can be made with the three included jets, resulting in significant horsepower gains