Catalyic converters.... can I take them off?


Asked by Jan 29, 2012 at 12:46 PM about the 1991 Nissan 300ZX

Question type: Car Customization

Can I take off my Catalyic Converters without causing sensor problems or the car throw some codes? I want to grab a few extra horsepower out of my Z. The car came with a Flowmaster exhust system but only from the Converters back. I would like to just go with a stright pipes by passing the converts. Will I beable to do this?

4 Answers


Your car wont care about the Cats --If you have a state inspection, they wont like it. The crazy thing is that if your cats are working -- they dont affect performance. If they get clogged up from extra fuel - thats when your cat problems start -- a Higher perf cat may be an option if you have to stay green


I live in maryland & If you tag your car Historic in this state they don't require an Inspection. I just wanted to know if it's worth doing at all? Matbe a little HP gain & to make it sound better....


its worth it

1 of 1 people found this helpful.

I think I'll take that project on this weekend along with the other I have to do on that car...

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