All the screws and mounts are the same, the wings are the same, the only problem is the size of the headlight housing, the IS300 one does not go through the hole in the radiator support of an IS200. Cleanest solution is to get an IS300 support, easiest is just to cut the front end ... Anyway, you will need the HID ballast to bolt on the back of the headlight are the projectors do not have the same size as the IS200 therefore they cannot be swapped.