No! don't touch the wiring in the dash. Your dx wiring harness is identical the b18b harness, except that the b18 has a knock sensor. If you use the dx harness, you will have to run wires from the knock sensor to your b18 ecu in the pass. panel. Using the b18 harness, you will have to run wires from the shocktower connectors to the ecu. they are an equally easy task.