From what I understand, you cannot just put projectors in the halogen enclosures. I haven't actually taken mine apart, but from what I've noticed, the HID enclosures have a small rim around the projectors where as the halogens have a solid internal lense covering the bulb.

OEM HID


Halogen - its hard to see, but you'll notice the difference in the enclosure configurations.


Hope I'm right and that this helps...