Not an unexpected result 911monty. "More free flowing" does not always mean more power if the exhaust tuning changes significantly. It's a physics thing.
For the best bang for the buck I think the Pedro PSE mod results in a slightly louder and more angry sounding exhaust without nasty drone or torpedoing the Porsche tuning.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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