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