paint94979 wroteI'm with you here. Just installed secondary downpipes, valve controller, and a full FI exhaust. The sound is definitely improved but still very mild even with valves fully open. I'm thinking I may need to go with GESI catted primaries. Our X5M is a family car and my wife is fairly sensitive to loud exhausts, and she didnt even notice the change.It doesn't though... Everyone has different tastes, my 24 X5 M with secondary catless downpipes and a valve controller sound sad, this is why I'm swapping in catless primaries. To each their own. The valve controller is really handy, factory mode, closed, or fully open. Lots of flexibility.
Coming from an F80 with intake, equal length midpipe, and Remus exhaust, I'm hoping to get a little closer to that set-up volume wise with the valves open.
. I really think these cars are just too quiet. Again everyone has different tastes, here ill expand further... You are happy with yours I am not see... ha.