The AEM Water Injection Kit is a safe and economical way to reduce air inlet temperatures to increase boost pressure for more power. Lower air inlet temperatures allow users to advance timing without having to run higher-octane fuel. This is the most complete kit available on the market straight out of the box- no additional parts required. STANDARD WATER INJECTION KIT * Universal kit includes everything you need for installation * Progressive, controller-driven 150 PSI pump * One-gallon tank with integral fluid level sensor * Dash light for system status and low fluid warning * Alcohol Compatible (up to 50% in solution with water) * Progressive controller, provides boost-dependent variable flow * Output provided to either decrease timing or boost if the system runs out of fluid or detects an error * Includes three jets to match your power requirement HD WATER INJECTION KIT * Kit includes everything needed for installation * Large-capacity 5-gallon reservoir with integral fluid level sensor * Boost Safe lets you retard the timing or reduce boost if the system runs out of fluid or detects an error * Progressive, controller-driven 150-PSI pump provides boost-dependent variable flow * Dash light relays system status and low fluid warning * Methanol & alcohol compatible (up to 50% in solution with water) * Includes jets to match your power requirements * Reduces exhaust gas temperatures (EGTs) and inlet air temps on turbo-diesel and gas applications