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Ive never heard of downgrading an exhaust on an N/A car... Although with carb engines you do need a certian amount of backpressure, but you get that through the exhaust size.
The old exhaust on my dads car was like that, and it killed the engine. It robbed so much power than when we put on a bigger exhaust it was like a new motor.
Do you have any articles or anything from that?
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1994 Oldsmobile Cutlass Supreme SL
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