Believe all I have seen when researching for HID's is you need two kits which means 4 ballast and 4 bulbs. Kinda expensive way to do it. I bought mine from ddmtuning.com. Bought the 9007 high and low beam kit but the high and low actuator never worked and they never sent me a new one even though I have lifetime warranty. Customer service aint too hot IMO but the light out out is awesome. Their bulb and pattern is hard to beat from other ones I have seen.