sorry umm what did you mean by a quad retrofit? i am pretty new to this stuff and all i really want to do is just change them so i can get a bit more light out so i can see when driving.. so im guessing low beam would have to be a 35w circuit and im not sure about the high beam on thursday i got my first day off so im going to start having more of a better look into what i need to do.. im hoping its going to be easy as buying a plug and play set and just install them but im still kind of worried about having to take off the front bumper to be able to even access the lights.