Audi S8 Muffler Delete

I got jealous of the muffler delete on my wife’s 2008 BMW M6, so I decided to do the same to my 2007 Audi S8 5.2 FSI quattro. The mufflers were replaced with two straight pipes with custom Y-pipes and dual tips. We left the factory resonators in place so that the sound would not be completely overbearing. The exhaust note is very mild below 1500 rpm -- just a very low, deep rumble, which you can probably only hear if you have really nice speakers or headphones. The volume is very tolerable inside the cabi