The LED CREE H7 double sided cells along with the heatsink/fan does fit inside the headlight assy. with rubber cover put back in place. Dexterity and patience is required to pass the LED power cable thru the bulb retaining wire before it can finally be secured in place. Small long noze plyers or tweezers will help accomplishing this. People doing this mod will know what I mean. To avail extra room, I unbolted the coolant reservoir and moved it to the side. Because the LED cells emit light on top and bottom only, the light emitted is somewhat less efficient in a projector like what is used in the Crossfire, than in a conventional lens