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GMG 997TT WC-GT Exhaust

Kevin Kd Davis

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Looking to put a new exhaust on my 07' 997TT. From the Youtube clips the GMG WC-GT exhaust sounded the best to me.

Spoke to someone about it and they told me the GMG may be too loud. My last car was a 996TT with a TechArt system,

which wasn't exactly quiet.

The alternative systems I've been looking at are:


Kline Innovations

Any info on any of these would be much appreciated. Or if there are any other systems I should check out let me know.



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  • 1 year later...

Even though this thread is old a response is warranted.


I would go to those weekend Caffeine & Cars meets and talk people up about their exhaust so that you can hear them in person and get some feedback from the owners.

I have a Agency Power exhaust, it's not too loud and I like it (so does the wife)

Edited by cam2008
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