My friend swears that if you remove or hollow out your catalytic converter, your car will get a major boost in power, especially if its a 4 cylinder engine. Is this true or an urban legend?
Great answers! This is just for sake of argument between my friend and me. I have no intention of risking my engine. He says teens do it all the time.
It is true, but also illegal for street operated vehicles.
Stay legal and replace it with a high flow catalytic. Which most shops will and can install for you.
But putting a straight pipe they will not do.
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