I wish the weather wasnt so shitty here or I would have the exhaust off mine messing with it right now! Someone should do my idea!
Remove all packing, replace outer pref pipes/mini resonator with solid and leave the center pref pipes alone. Or just leave the left side alone, open up the right, wrap the outter pipe and remove packing.
2008 e92 335i 6 speed, Intake
2005 Sea Doo RXT (stock for now....)
2004 545i 6 speed, lots of mods- SOLD