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That's it. A whole big magilla over the sound. Sport Chrono and PASM change throttle mapping and damping. In a Turbo you also get more boost. It gets even better. In the 991 you can get the Sound Symposer. I think it opens a tube or something increasing the conduction of engine noise into the passenger compartment. No kidding. Next they will be stuffing microphones in cylinders 1 and 4 and wiring them to the cars sound system so you can sound like a Harley.

Edited by Mijostyn
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Yes, it just changes the sound with the aid of a solenoid and flapper valve. If you feel like changing the exhaust system go right ahead. The only down side will be a worthless switch in your center console. It won't affect anything else in the car. You can save a lot of weight in the back of the car by going to an aftermarket exhaust like Fabspeed and you'll sound sporty all the time.

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If you change to 200 or even 100 cell cats, you will get less back pressure and increase horsepower as well...If you are just changing mufflers....Sound only :)

Makes a much bigger difference on 997 Turbo. I noticed it immediately on mine...Spools up quicker....Still on a NA car, flowing more exhaust quicker will enhance your performance



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