[Ataki]

I don't know much about the DTH exhausts, other than it wasn't so much the issues they had, but the way their customer service handled things.
It seems most of the aftermarket exhausts use Magnaflow canister mufflers, When I get to my lunch break, I'll get a couple of photos and try to take a few measurements for you.

 

[Ataki]

Thank you, did you happen to get measurements of the muffler by chance? We're going to be fixing the exhaust on Wednesday one way or another

I did, sorry It took so long to post them up, totally spaced on that one.

The Muffler on mine is a Magnaflow, 14" long x 4" diameter case, 2.25" inlet and outlet.
I believe it is this one: https://www.magnaflow.com/products?partNumber=10415

The flex coupler is 4" long, 2.25" Inlet and outlet.

I would advise that if you are fabbing up the exhaust from scratch, to use the longest flex coupler you can. The amount of vibration in the exhaust on these cars is pretty crazy.