[JL8Jeff]

And how many of you guys had "tuning" done which leaned the car out and destroyed the engine? So that tells you that your cat was most likely damaged by your own tuning. High flow cats will not affect power levels up to around 500 hp. When you get above that level you could still run some 3.5 or 4" cats and have minimal losses. But at that level the car is most likely not a street vehicle so why bother with cats. Did you flow test your cat after you removed it to see if it was functioning properly? Most likely not. I know I picked up power when I put a 3" high flow cat on my 93 Pace Car. Tests prove that these cats flow enough to not restrict power. So there's no reason to be running around on the street without a cat(s).