How Do,

About two months ago I replaced the entire exhaust system on my beloved (but
still be-troubled) '85 Westy.  I was hoping the new metal would make the bus
a little more sociable, but I find that it still makes the aforementioned
chuffing noise, just a little bit quieter now.  When I compare the sound of
my bus to Pete's '88, it's not the same at all:  he gets a nice low rumble.
I've gone through the entire exhaust system and verified that everything is
nice and tight.

What mal-adjustment is causing this?  BTW, my brand-new exhaust system
already looks like it's 4-5 years old, complete with a rusty tailpipe.
What's up with that?

Cecil
'85 Westy Wolfsburg edition "Der BrotKasten"