RE: resonators with trakpak
Cuda340 is correct. There is not an option to modify the exhaust. If you get the Track Pak, you automatically get the modified exhaust. Just as Cuda340 said, the suitcase muffler is replaced with two bottle resonators. All Track Pak challengers get this exhaust setup, and by virtue of that all 6-Speeds get it. Automatics get the standard exhaust setup with muffler.