Quote:
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Originally Posted by JL8Jeff
An aftermarket true 3" in/out cat will make almost the same power as no cat. The stock cat is not 3" in/out and even the Random Tech cat is not a true 3" in/out. The muffler costs way more power than a cat. I put a true 3" cat on my old Pace Car with the Borla y-pipe and it made a noticeable difference. I would have never passed emissions without the cat on that car.
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Explain to me how this:
robs more power than this:
