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Another thing to bear in mind is that there are 3 different versions of the stock Porsche (non-PSE) 997S muffler. As the results people are getting with just a cat swap seem to vary from horrible (Nexus, me) to perfectly acceptable, I'm wondering now if it depends on the version of the standard muffler fitted to the car.....?
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Ian
Manchester, UK
1999 C4 Black / Black - Sold
2002 C2 Basalt / Black - Aero Kit, PSE, 18" Carrera Wheels - Sold
2005 C2S Silver / Black - A few modifications!
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