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ADmaster71690 · 03-04-2009, 07:49 PM

What I meant by a downpipe is a pipe that goes straight from the exhaust manifold to the rest of the exhaust system. This would completely remove the catalytic converters for better breathing.

But what brand high-flow cats do you recommend?

03-04-2009, 07:49 PM	#3 (permalink)
ADmaster71690 Base Member Join Date: Mar 2009 Location: Detroit Posts: 79 Drives: 2003 Saab 9-3 Rep Power: 261	What I meant by a downpipe is a pipe that goes straight from the exhaust manifold to the rest of the exhaust system. This would completely remove the catalytic converters for better breathing. But what brand high-flow cats do you recommend?