Hello z drivers, I have a question, I have a 1990 330 zx Na and I'm wondering how should properly eliminate the catalytic converters? Would I gain some horse power? Would I have any problems with the performance what's the right way of doing this. Details please.
Thank you.

 

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You won't pass smog with them installed. You also might get the "raw exhaust" smell inside the cabin. Depending on what else you've done (mods), it can help w/ performance (maybe a few hp).