AEM (30-3351) V2 5-Gallon Water/Methanol Injection Kit with Multi-Input Controller Multi-Input, 0-5V/frequency-based progressive controller design for use with external MAP sensor for boost or MAF/IDC on high compression NA gas vehicles Multi-Input controller features large adjustment knobs, integrated plug for harness connection, integrated fuse, covered status light and test buttons for enhanced splash resistance and mounting tabs Wiring harness is terminated with a positive-lock connector on one end with color-coded wires to ease installation, power and ground wires for the pump and additional wire for optional on/off fluid solenoid Internally-bypassed water/methanol injection pump does not cycle on/off and provides quiet, smooth operation; it features robust construction including integral hose fittings Precision-machined billet-aluminum injector with integral check valve; three interchangeable injector nozzles to cover a wide variety of HP levels