It does seem logical that the vibrations in my exhaust system are set
up by
the engine, an external source. But here's a way-out thought. Why
could they
not originate in the mufflers themselves? Some sort of imbalance
created by
chronic congestion.
Way, way out. I would seek to lay blame on a device that was actually
designed to produce mechanical motion in the first place. You're no
doubt seeing a resonance that is supposed to be damped by the normal
construction of the exhaust system. I'm betting something is not
right in the mounting.
-- Jim
