a retrofit is when you completely open up the headlight housings and install LED projector housings or HID projector Housings. Your halogen projectors will work with HIDs, to break it all down in a school grade system kind of way. A retrofit is that kid that always went above and beyond. The guy who scored 110% when you didn't even know there was even a bonus question. putting HIDs in Halogen Projectors will get you a C in class, it works and it passes the test and the glare is minimal but it's still there. HIDs in regular halogen lights, Will get you an F, that kid that just shows up to class and sleeps the whole time and doesn't care about school. I think that's about as simply as I can put it. info on a retrofit? Just google HIDplanet retrofit, all kinds of things will come up. If you got money to spare or you are a good DIY kind of person you can do a retrofit for $300-$2,000. depending on the pieces you pick and if you are building them or someone else.
