On Sat, 08 Dec 2012 15:45:57 -0500, MoPar Man > wrote:

>I've been looking into various brands (Walker, Magnaflow, Flowmaster,
>etc) and can't really find anything made with stainless steel that
>matches the dimensions of the factory OEM muffler.
>
>The 300m has a muffler AND a resonator under the rear of the car. The
>tail-pipe comes out the resonator (which looks like a muffler but
>apparently isin't).
>
>The original muffler shell measures 18" long, 12" wide and 6" high (oval
>profile).
>
>I can find some aftermarket stainless mufflers that are 18" long, but
>their oval profile seems to be quite a bit smaller (5" by 8" for
>example).
>
>For non-stainless types (aluminized) the Walker 21375 seems to be a good
>match - but I'd rather replace it with another stainless steel one if I
>can find it.
>
>Any ideas?
>
>Comments?


Unless you're doing an exact MoPar replacement then as long as the
lengths are correct you shouldn't be concerned. I've not seen any
performance exhaust mufflers that are perfect matches.

I replaced my factory exhaust system with a Borla SS set and the pipes
were larger in diameter, there was no reasonator and the mufflers were
smaller. But the double walled chrome tipes still came out the back
where they should be. And there is no comparison to the tone
improvement.