It looks like there are 3 main choices with the rear end when running GT flares.
1) Long rear valence (briefs)
2) Short rear valence (knickers)
3) No rear valence (g-string)
They all look good, but I just can't make my mind up which to go for.
I can find plenty of photos of option 3 with 2in-2out mufflers, which do look cool and "GT correct".
However, I have a 'traditional' 2in-1out 911 muffler fitted to my car at present and am not sure I will install a LOUD 2out option (as I will use the car for long euro road trips and am deaf enough already thanks).
Before I decide on which of the 3 options I'm going for, and which muffler, I'd be really interested to see the various combos people are running.
That is to say: Please post your photos of all 3 options and with as many muffler combos as you've got.
I'll kick things off with an easy one to find. Option 3 with a 2 in 2 out racing muffler: