I replaced all my exhaust pipes (not the cat or muffler) last fall with
the Dansk pipes from Bus Depot.  It smelled for several days while the
gray paint burned off.  I don't remember how many miles it took before
the smell went away.  But the paint discolored while it burned.  When it
looked more like metal with suface oxidation, the smell went away.

More recently, I put on a STEBRO muffler.  Smelled again, though
differnet smell.  Smell went away (but it still looks nice peeking out
below the bottom of the body panel).

So don't worry unless it goes on for a long time.  And don't spend too
much time back there sniffing!

Pamela Browning wrote:
>
> I recently had a Bus Depot muffler installed on my 87 and now when I
> drive it a bit & it warms up, it smells.  Has anyone noticed this before
> & if so, how long does it last?  I'm not sure if it's the muffler
> breaking in or something burning!