The Mac Prochamber is an awesome mid pipe for the 04 and older cars, however I personally don't feel that they have improved it over the years for the newer cars. The sound is awesome, however the performance really is just not there.
The Prochamber only has 2.5" piping, while most of your aftermarket mid pipes now come with 3" piping. This wider piping translates into better flow and more horsepower. If sounds is your selling feature the Prochamber is not a bad choice, and might be the way you want to go. If you are looking for power and sound I would go with the previously mentioned Magnaflow pipe, or even a Pypes X or H.
I hope this helps, and if you have any other questions feel free to ask myself or our customer service team below my signature. Good luck!
Dan Bailer | AmericanMuscle.com
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