[s-cars] Stromung questions, specifically cats vs straight pipe

[James Bowes]

Real quick background, just installed my Gen 2 Stromung on my 95.5 S6 Avant.
Workmanship was awesome. I have the smaller center resonator and am running
the straight pipe, and the noise is really bad. It's what I believe is
referred to as 'droning'. Pretty much at all speeds/rpm's. Seems to be in
mostly the midrange. I have the Magnaflow resonator that Stromung sent out
to address this issue, and I'm having it welded into place tomorrow after
work. I hope this solves the 'buzzing', as I sound like a damn rice-boy.

Anyways, here's my question... What will installing the cat converter in
place of the straight pipe yield in terms of performance and sound? Yes yes
yes I'm concerned about the environment, so we'll leave that out of it for
now please. First off, how much does the cat help with the noise level, and
which frequencies would see the most dampening? Second, does the cat affect
the performance much? How so?

I'm tempted to leave the straight pipe in and get the new resonator, but
I've spent a lot of time rolling around under the car this weekend and I
want to be done with it. Fiancee is getting pissed.

Thx in advance