997 2005-2012 911 C2, C2S, C4, C4S, GTS, Targa and Cabriolet Model Discussion.
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Ordered Fister Exhaust today!

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Old Jun 4, 2017 | 10:42 PM
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Originally Posted by gasongasoff
911nitis, thanks for the review - I wonder if adding a center muffler bypass might improve the sound at higher rpms?

BTW, there's a rumor going around that the Fister/Gundo mod might reduce slightly hp at lower rpm's because of the reduction in backpressure. Did you notice this?
Might be a little late to respond to this, but no, i havent felt a loss of HP. Also, I think it is hard to feel a 1-5 HP loss/gain, anything above 10 is maybe a little more noticeable? The exhaust is solid though and highly recommend.
 
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