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Cat Delete
I've been surprised to find almost no information on the site regarding exhaust modification. I'm specifically curious about the effects of replacing a catalytic converter with a testpipe. I know the cat is typically the most restrictive portion in an exhaust and opening it up typically results in a few HP gained, just not sure how this correlates to efficiency. As a general rule (and assuming a properly functioning cat) would you expect to gain, or possibly lose, power from freeing up exhaust flow?
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