I have a Dansk pre-muffler (w/02 bung) and a Dansk 1 in, 1 out sport muffler on my 84 911. The muffler has the 84mm outlet.
Really like this setup. Nice sound, but not obnoxiously loud. No drone and engine feels more responsive and strong. The Dansk muffler fits well and can use the original muffler straps.
