s65 exhaust on s550 TOO loud help
http://www.youtube.com/watch?v=9Oyrki5Vvso
A switchable exhaust requires an electric valve (available ebay and other places) coupled with two exhaust paths to choose from. One path is more muffled than the path that the valve leads to. This would be custom work.
If you can post pics of the stock exhaust and undercar of the new exhaust I or someone may be able to spot a location for either the dual path or to add additional muffling devices such as resonators.



