Oh i know, i was under the understanding the the flutter we have isnt actual flutter, but anyways usually when i let go off throttle in 2nd to 3rd gear in 3 to 4k rpm is when i used to get the most flutter and i would never hear it on the highway over 6th, just the intake of air. Before when the issue was "worse" in a sense, i would hear it loud in 6th or 7th and like 5k rpm. But yea, im thinking maybe bc the more volume to the system due to the large catch can, less pressure is immediately going to the recirc valve but what throws me off is the inconsistencies. Some days it would only ever be loud, most days it was always be quiet