Ok, since we're talking about the rear diffuser, does anybody know the p/n for the two
12mm nuts shown in this pic. When I replaced the mufflers I took off the diffuser and discovered that these two nuts were missing.
I looked on realoem.com and thought it was p/n 51711958025, plastic nut, #4 in this diagram, so I went to the dealer and they gave me two plastic nuts that aren't threaded and have a much wider built-in washer base. I haven't tried to put them on and I'm not sure that the washer base will fit into the recess, so I don't think that this is the correct part (click diagram for realoem link):
Hmmm, looking at this diagram again, I think that it's actually p/n 12421438388, cap nut, #30 in the above diagram. Can anyone confirm?