i'd like to claify the wiring harness situation. first off neither will give you problems plug and play OR using the wiring harness. Of course it depends on how your harness is designed. mine uses 1 stock harness female connector to activate the relays, usespower directly from the battery to the headlights with a 15amp fuse inline. SO your stock wires won't burn up. if the harness is designed poorly and the same style as this, THEN there might be electircal hazards... (the fuse should take care of any shorts tho)