Wish my car would Flutter ;) ;) you may have to take your BOV valve off, not too sure but there maybe another way around it, like on the Blitz BOV you can adjust when the BOV opens and to get it to flutter you would need it to open as late as possible. I.E stiffen it instead of softening it. Would also wor better with FMIC so i heard Not 100% on this Edit: i thort this was gna be a video clip of your car fluttering............ gutted but once you know how post a vid ;)