I use the ARC ( auto rod control) setup its fairly cheap but : works great! I used the control panel with the NOS switches in it and I like it very much. There good to deaL with also !! The wiring harness is great, relay panel is kool and they have a fairly new one thats very neat and spaceage, (for nitrous) David. Good luck to wiring your cars,I enjoy it, its kind of fun!!!