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If i cut out the catalytic converter in my 2004 Pontiac 2000 will it cause any problems?

Answers from the Automotive Experts

Amy Mattinat, Owner and Author at Auto Craftsmen Ltd Oh Dear Bob, Yes this will cause problems. #1 it's illegal. Federal regulations say every vehicle that came from the factory with a cat needs to have a cat. They are used to reduce harmful emissions from the atmosphere. They are used to reduce harmful emissions from the atmosphere.

Gail Dunn, Owner at Women's Automotive Connection Removing a catalytic converter is illegal, both federally and in most states. If you have emissions testing, you will not pass. I would not recommend this.

Gelina Aquilina, Service Advisor / Mechanic at It won't pass smog

Maryann Croce, Owner at Croce’s Transmission Specialists Bob, On your 2004 Pontiac: I recommend replacing a bad catalytic converter NOT removing. Removing is illegal. Catalytic converter reduces harmful vehicle emissions. A check engine light will appear without a catalytic converter and a vehicle will not pass smog or emission testing.Good Luck.

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