Thanks for the feedbackI have stainless redline active h with kooks catless headers. its loud. it does drone depending how you'd define it. if you're cruising is putting your foot down lightly to maintain speed then it has the hum. if you let off and just ride without throttle input to maintain speed it has a slight hum very unnoticable unless you're paranoid about drone. although i do admit h pipe setups do tend to drone so there's that. idle sounds disgusting though (in a good way). it just sounds like its gurgling and pulling up to places definitely catches attention. it's also loud above 3k.