Is it just me? But small muffler exits seem real wimpy. The 1400 immediately comes to mind. Regardless of the back pressure issue, MG could have flared those ends for a more throaty looking if not sounding muffler.
Spud
I was looking at that around the rally site a few weeks back...
If I has a cali, I would tape off the muffler and paint that entire concave 'well', including the little peashooter pipe with black BBQ paint... It would give it the visual look of a big open megaphone.
Aww who am I kidding! I'd put some Agostinis on it!
