@dubber36 I'm guessing that the Hid lamps fit as easily as the halogen lamp ie. same dimensions but are there any issues with the driver and flying leads as this is the situation with the H4 headlight in particular.
Fitting the bulbs was as straight forward as the halogen ones. There is a lot more gubbins with HIDs that won't fit inside the headlight. There is a grommet on the wiring harness, so I cut out a hole in the rubber cap on the back of the headlight for this to fit into.