The projectors are actually Bosch HID projectors. They are often reffered to as E46s,which I believe reffers to the model of BMW they are from but I think they are actually called ECEs as I have seen E46s in bixenon configuration as well which gets confusing. The main reason I am using these is the limited amount of space to work with. There is lots of room ahead of the mounting plate due to the stock 3-inch projector but not much behind that. I am looking forward to hearing from you!