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Originally Posted by NJSPEEDER
the cat is about 10timees the restriction that a muffler is. putting a cut out after the cat is a complete waste of time.
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Wrong! The muffler is 10 times more restrictive than the cat. I've told you this before Tim. Tests have shown that mufflers are way more restrictive than high flow cats. So removing cats and keeping mufflers doesn't gain much at all except the ability to lean out the mixture to the ragged edge. But for him, I don't understand why he is bothering to keep a cat if he's running non emission's headers. You won't pass the visual inspection without the AIR setup so who cares if there's a cat or not. But true, most people would put the cutout before the cat.