Wiil part #44554-03 fit a 2004XL1200custom

Could not find that specific part number in my catalog, but assuming it is a SuperGlide front wheel, yes it will. You may have to buy the model-specific wheel installation kit. But be advised, the new wheel will drop your front end a bit and the clearance to the front fender may look a bit weird. Most, but not all, front wheels from 2000 up to about 06?? will interchange with a spacer/axle swap. Make sure your brake rotor spacing is the same too. I know between 1999 and 2000 it was changed. Not sure if there were any running changes in between 2000 and 06.