Frank:
Having had 4 MGB's I think can help.
With '65 B, I tried eliminating the front muffler as it too often got caught
on my driveway. N.G. Too loud, even for the young buck I was at the time.
With the '80, stock system gave way to Abarth, smaller diameter than yours.
Not much different than stock in sound.
With the '66, I went from Abarth to SuperTrapp to Peco.
SuperTrapp did a good job of silencing, and you can get a variety of
inlet sizes. Only problem was engineering the exhaust pipe route. Not
easy. Sound was different. In fact I used to park in an underground garage
& one day got out of the B while it was running. At idle it sounded like a
small-block Chevy V-8. Remove the baffles & it roared.
Peco was just a big muffler in the position of the usual rear one. It
had a rumble, but wasn't annoyingly loud on the highway. For racing, I just
removed the muffler & installed a straight pipe. Easy to do at the track.
Norm
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