u dont need to cut into the dash. you can run the wires through without cutting the dash at all. the only thing is you will need to run 2 wires through the door molex connector. so you will have to do a little dremelling but not that bad. cant make a pnp harness because it needs two additional wires that dont exist in the usdm version. but the only thing you need to cut is the door molex. nothing else.