he can know all he wants. but i know my car, and i saw the dyno runs w/ & w/o it. the car is faster in the top end, and the low end hp is higher. i don't care what he thinks he knows about MY car, he's wrong.

now, i must correct myself. the gain in hp simple changed w/ the cat. it hit 129.7 a few hundred rpms quicker than w/o it. i didn't quite word it right. my bad. hope you get what i'm saying now