OK first of all thanks for all the replies...they all add some info to clear this up for me.

So, for the 4.8is look up front I need to get the entire front bumper, which would including the extra body-color "spoiler" piece at the bottom which is really what we're all looking for.

Or...I could get the 4.6 front spoiler piece and have that painted and added to my 3.0 front bumper.

Is that the final answer!?!?

If so....how is this ebay listing selling that a "4.8is kit" that mrbmwx5 was so kind as to post?

I remain confused....(but thanks all and please lets flush this thing out!)

BMW e53 X5 4.8is Body kit:eBay Motors (item 250560198568 end time Feb-06-10 23:44:17 PST)