You'll need a coat hanger, some quality cable to go through the door to the midbass, cable ties, a lot of patience and some luck. lol Just joking, it's not that bad, but it can be a bit frustrating. When I did mine I ran new cable into the door through the rubber boot that goes through the door jam. It can be frustrating to get the plugs out of both the door and the side of the body but it can be done. Trace your factory wiring back from the speaker through the door jam into the cab and pull it all back inside the car. This will be your signal to the crossover. But before you pull it back through the door jam, solder the new cable to the end of it and pull it through. This will save you heaps of time and swear words instead of running it from the inside out. This cable will go from your midbass to the crossover. You then need to pull the side panel off the dash to run the cable for the tweeter up behind the sail panel. Connect it all up with the crossovers tucked up under the dash and cable tied firmly in place and your all done. Hope this helps.