You are really going to like the H4's, the Z beam is great and the side lighting is incredible for spotting deer. If you get the 100/85 watt bulbs you aren't going to believe the light from these. I have had them installed with the stock wiring now for a few years, no problems. Some have recommended installing heavier wiring with heavier relays, but mine have worked fine. You could possibly get even more light though with bigger wires maybe. Although these cars do seem overbuilt in most cases.