I'm on the fence on this one. On one side, I completely agree with Anchorman on exhaust flow changes. In addition, I personally believe an exhaust note sounds much better coupled with a manual transmission and the US currently only has the automatic available.
On the other side, I replaced the my manual transmission Miata's' exhaust header, mid-pipe and exhaust with Roadstersport products specifically designed for the MX5. I absolutely love the sound of that car and have received many compliments on how it sounds sporty, without being ricey or loud as the note is about 20 percent louder than stock. In addition the improved flow added about 10 HP based on my butt dyno.
Personally I will wait and see with the aftermarket brings. A couple of weeks ago I spoke with people at Racingbeat and they recently obtained a CX3 for aftermarket product development. They indicated one of the first products they will pursue will be an exhaust.
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