What is your favorite performance muffler?

I think it's a 340 with a MP purpleshaft 484/284 cam and a Flowmaster system. The Dart is getting a 360 with that cam so hopefully I'll get lucky. Here's another video of the Cuda running.

[ame="http://www.youtube.com/watch?v=sGzFpRF08QU"]1971 Plymouth 'Cuda - YouTube[/ame]