Would running it without a cat converter damage engine or driveability (thought only injected cars had cats?)
please help me my car sounds like a lawn mower!

Best and cheapest option is to find a replacement factory item in good condition and drop that in. Make sure the exhaust studs are solid as these tend to move and pull out resulting in the chaff cutter exhaust sound...jayrad wrote: the headers? down pipes? manifold thing-o are a little worse for wear flattened and a rusted cat also.
Would running it without a cat converter damage engine or driveability (thought only injected cars had cats?)