Hi Tom, spoke to you the other day on the AudiWorld forums regarding our lean codes.
Do you have any videos of the S8 exhaust?
Did you mean you've tested it with the rear boxes (mufflers to you!) removed and it was too loud? I've seen a few videos on YouTube of these cars with the rear boxes removed but they all seem to sound different - I suppose it's hard to tell from a recording.
A few people also remove the X-pipe to change the sound (a bit like the C63 AMG), but I understand this will lose a little bit of power. See the following video:
https://www.youtube.com/watch?v=KPjZhaoWDy8
I was planning to swap over to S8 rear boxes (with flaps stuck open) to start with, and maybe swap the middle box in future. Does it not sound noticeably different to the standard A8 setup?
Thanks