Thanks to others on the board....someone had posted a picture from realeom.com for parts for the X5 rear bumper trim panel.
After the 2004 facelift, I noticed that the 4.4i and the 4.8is has a "ring" around the outlet where the exhaust tips comes out in the rear trim.
The rear bumper/trim is essentially unchanged from the 2000-2003 X5.
Being that I have a 2001 X5, I thought I do a minor mod and update the rear exhaust outlets.
There are two "heat protection" rights--left and right.
See part #15 in this diagram in this link:
http://www.realoem.com/bmw/showparts...51&fg=15&hl=26
HEAT PROTECTION LEFT 1 51127010123 $7.98
HEAT PROTECTION RIGHT 1 51127010124 $7.98
They are about $8 each and they just snap right in....
Make sure you get a "lefty" and a "righty" because they are NOT interchangeable.
So anyone who has an older X5 with either an aftermarket exhaust like the Remus, Eisenmann, Dinan or and older 4.4i/4.6iS, you can add this to complete the trim (looks unfinished without the "heat protection rings").