My exhaust is stock with the exception of the short tails. At idle its a mellow low grumble/ gurgle. cruising is quiet. WOT is insane!. TP's or HFC's would be wild! The drone is at 4-4.5k rpm, but honestly isn't that bad. You can still hear stereo or have a conversation fine. After about 500 miles it settles down and sounds even better.
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