Package deal for N2MB boxes for the SRT-4. Plug and play WOT box harness, boost box harness plus shift light in any color for only $170! Install your new toys with minimal splicing (3 wires for boost box get spliced behind the radio) and tuck them all into your glove box plus get a shift light that flashes when you achieve your set RPM! Small bright LED you can mount anywhere by drilling a small hole and securing it in place.