Yes. 07 GT because Chrysler couldn't put out a real sports car with a stick and Chevy is way to expensive. That's another story. I'm not a Ford fan, but I am a Mustang fan if that's possible.

Anyway, I like the Dynomax because they are cat back, and the SLP for the sound. Dynomax sound nice, but the SLP sound much nicer. The Flowmaster didn't quite have the same rumble as the SLPs. Though I'm not sure why I'm even looking into this because when I get the chance then I'm hopping all over the Challenger.