Quote:
Originally Posted by David Inc.
I was surprised too! From what I've seen that's how some specialty builders get bonkers high frequency harmonics from exhaust systems, at the expense of proper flow.
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unmuffled harmonid=cs are always going to occur where in the rpm range depends on the length, width and shape of the various sections(organ pipes)
muffled the RSR that I just installed is the only non factory muffler that has zero high frequency noise, It's really astonishing.