im not all that familiar on the subject but i do know that they are 2 entirely different systems of lighting and if you wanted to convert to hid halos you would have to buy the headlights, and the housing, and probably have to do some rewiring. overall it would prove to be an expensive operation . it's better just to get rs. although i think AAC makes a relatively cheep led halo that goes on top of a non-rs halogen bulb.