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Let me tell you...compared to my old 07 EG Classic with the old 3.5" TD Rineharts....these things are LOUD!!!!!!! I can damn near put my fist and arm arm down the rear of the muffler.
Im hoping they mellow out some.
I have 3.5" Rinehart Classic True Duals on my 2011 Ultra Classic. They are just right, sound-wise. I intentionally didn't get the 4" because I figured they might be too loud. Based on your information about the 4" ones, I believe I made the right choice.
Don't know about the classic true duals but having had both the 3.5 and 4 Rhino slipons on my stage 1 96 the 4" are deeper but quieter and more touring friendly
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