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997 Turbo / GT2 2006–2012 Turbo discussion on the 997 model Porsche 911 Twin Turbo.
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997 muffler modification

   
Old Jan 5, 2011 | 11:35 AM
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Originally Posted by Webtool1
Don't they all drone?
Mine's getting louder as the miles add up and guess what? it's starting to annoy me now. Thinking of going back to stock.
In my 996 tt days, members on here used to open up the stock systems with supposedly good result. Anyone try this on a 997tt?
wow, surprised to hear that. My only complaint is the buzzing rear window, but hopefully Porsche can fix that.
 
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