I installed a Dansk "sausage" muffler on my '01 S and experienced some drone between 2800-3000 RPM, but it wasn't too bad - I just kept in a lower or higher gear.
I later had Dansk headers installed and the drone disppeared. I guess the harmonics of the headers and muffler together must have cancelled each other out. All I know is that the problem is now gone. I still have stock mid-pipes with the secondary cats.
|