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manrico manrico is offline
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Join Date: Oct 2008
Posts: 2
Porsche Crest Cat by-pass and emissions

Hello,

Does anyone out there feel that the use of a catalytic by-pass pipe may cause
their P-car to fail emissions? I have a 1980 911SC and in the past have used a
cat by-pass and have switched back to the original catalytic converter when the bi-annual emission test rolled around. Am I wasting my time? Can I just leave the by-pass pipe on and not worry about it? I prefer to go with the by-pass to reduce weight and for a slight performance gain.

Thanks
Old 10-13-2008, 02:49 AM
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