dual tone exhaust
 

This might sound like a dumb question but is the dual tone exhaust on a 2006 the same as mild to wild exhaust??

what fuse do I pull to keep open?

The NPP exhaust opens at 3500 rpms. Adding the aftermarket mild2wild allows you to open it at all rpms. You can get mild2wild with remotes that you can use to switch the status, or add a switch somewhere in the car. I don't recall the fuse # but you can google mild2wild instructions and the fuse # will be included. Or just google fuse for NPP exhaust.

PS, it's not really dual tone, it's dual mode.

bi-mode/NPP was 2008 and up. At least for non-Z06.