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I have a question along these same lines. I have a 03 986S that now has a 3.6 Carrera M96 engine in it. I'm still stuck with the 3.2 exhaust manifolds, cats, etc, but did do the pedro modification to the muffler.
As I know there is some HP yet hiding, I would love to see more horsepower and maybe a little bit better sound but believe that the current primary bore on the exhaust headers need to be bigger than what the 3.2 offer. Does anyone have any ideas? I don't have to worry about emissions.
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