I recently installed a new engine and bought a muffler an complete exhaust
system.  All working as it should but at cruising speed, 60-70 MPH. There is
quite a bit of noise from the muffler and coupled with the noise from the
tires it tends to drive me nuts. Any ideas on a quiet muffler?  I checked
the usual parts houses on line and there seems to be only 2 different types
of mufflers and I have one of them.
Cheers
Jaime