Water/methanol injection for gas engines is a proven means for effectively reducing engine inlet air temperatures and suppressing harmful detonation on forced induction and high performance naturally aspirated race engines. This allows enthusiasts to reliably increase boost and advance ignition timing-without using high-octane racing fuel-for power gains of up to 20 percent. AEM's Water/Methanol Injection Systems utilize the most robust hardware combined with more advanced features than any other comparably priced water/methanol system. On turbo Diesel applications, water/methanol injection systems reduce air inlet temps and enhance combustion efficiency which allows the engine to deliver more power with less effort. It also offers a host of benefits that promote engine longevity, including the reduction of carbon deposits left by a Diesel's exhaust gas recirculation (EGR) system. AEM's Water/Methanol Injection Systems for turbo Diesel HD trucks utilize the most robust hardware combined with more advanced features than any other comparably priced water/methanol system. The on-demand progressive Multi-Input controller in AEM's tank-less Water/Methanol Injection kit features a multiple input design that enables users to install AEM's Water/Methanol Injection Kit on both high compression naturally aspirated vehicles (NA) via the MAF/IDC settings and ultra-high boost gasoline or turbo Diesel vehicles using an external MAP sensor. The Multi-Input controller works with an external 0-5v voltage-based external MAP sensor, a frequency based input for Injector Duty Cycle (IDC), frequency-based mass airflow (MAF), or a 0-5v voltage-based MAF. Both the power and ground wires for the pump are included in the harness which simplifies the wiring process and eliminates any chance of the pump accidentally activating from a short in the system. An additional wire is included for adding an optional on/off solenoid to stop fluid flow when the system is inactive.