He used bosch e46 projectors which are used on BMWs and different projectors can be used but they fit without alot of modifications to the housing. Just make sure watever projectors u get, they have bi-xenon so u can use lows and highs. These are sold all over ebay.
Wrong this was a plug and play bi-xenon screw in projector kit. It is a lot less work than your traditional OEM projector retrofit. The actual projector I bought I no longer see on ebay as it seems they have the newer generation out. The difference seems to be the option of only 2 colors for the angels eyes instead of 7and they come with a shroud already mounted.
H4 bi-xenon HID projector lens(Generation3)& 2 ballasts - eBay (item 130372313047 end time Apr-05-10 00:29:56 PDT)