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 fuel-for power gains of up to 20percent. Water/Methanol Injection Systems 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 PN 30-3350 Water/Methanol Injection kit for gasoline vehicles features a multiple input design that enables users to install Water/Methanol Injection Kit on both high compression naturally aspirated vehicles (NA) via the MAF/IDC settings and boost vehicles (above 35 PSI) 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. The new controller design features large, turn-resistant knobs and larger numbering to easily set accurate start and activation points, with covered status LED and test buttons for added splash resistance. A plug is integrated into the controller housing for mating to the redesigned wiring harness positive-lock connector. The Multi-Input controller has an easy-to-remove plug covering the programming dipswitches and a programming legend on the back for the 0-5v and frequency based settings. The controller housing features an easy to access integrated fuse and molded mounting tabs. Multi-Input PN 30-3350 gasoline Water/Methanol Injection system compact 1 gallon tank includes a high tech conductive low fluid indicator with a positive lock connector and color matched wires to the wiring harness.