If you just want sound...and are cheap (like me ) ....the Megan Racing M-RS Muffler is the way to go.

I have it on my Crossfire ('05 Black N/A).

YouTube - Megan Racing Crossfire Exhaust

Price was $147.62 shipped to my door, paid $80 for install since the muffler comes with a Y split and the stock muffler is offset on the right hand side.

The guy just cut it off, bent a new piece of piping, and welded the new one one. (It is NOT a direct bolt on like I believe the Magnaflow is?)

Anyway, It's louder than !@#$ and I love it (slight drone at low RPM if you're coasting)

Feel free to PM me with questions

-Eric