Originally posted by TommyBoy:
No, that was not a joke, if you remove the convertor, yes you will see gains however if you just "punch it out" then the hollow chamber will creat turbulance and hinder performance 
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I can tell you one thing.....the performance of my car is not hindered. If you'd like to use common sense and not theory on this one......take a good look at the actual ceramic that makes up the Cat. The Contour pre-cats are roughly 6 inches long and about 3 inches in diameter. The actual space that the exhaust gases pass through are no wider than 1/16th of an inch square. Now...this would mean a 6 inch bottleneck of 1/16 of an inch.
Do the math. If these are removed how could they possibly restrict/disrupt airflow more than them being there???
