Do you think you need to order the exhaust system option since you can control the sound with the selector
The NPP optional exhaust has three advantages (and one, its $1195 cost, disadvantage).
Advantages: Four level adjustable exhaust, with louder loudest level than the standard exhaust.
Whereas the standard exhaust is 11% freer flowing (11% less back pressure) that the C6's, the NPP exhaust is much more free flowing, with 27% decreased back pressure;
Comes with four (4), 4" polished exhaust tips, compared with standard four (4), 3" non polished tips.
And while it is confirmed that you have four different exhaust levels with the NPP (with the standard Driver mode selector), we're still trying to confirm whether the car, without the NPP option, has only two or more-than-that exhaust levels.
Can anyone confirm the number of exhaust levels on the non-NPP standard exhaust?