Originally Posted by 2012mustang76123
so would the cat back system not let you pass inspection since it removes the catalytic converters?
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Cat-BACK just means everything from the end of the cats (not including the cats) and back is replaced. Cats are part of the mid-piping.
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Oh and the stock exhausr is pretty gd from the catback.
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And this. From cat to axle-back is sufficient with nothing measurable to be gained.