thanks alec, but tell me this, why is there two o2 sensors, the first one which is before the converters, obviously tells the computer how to manage the fuel/air, and the second one which is behind the converters. I doubt the second one manages the fuel/air......ok.....look at it this way, when the car is new, the converters are clean and less restrictive, as it gets old, they start to build up carbon and become more restrictive, so your telling me that the second o2 tells the computer to put more/less air/fuel in the engine as it gets older?...to me it makes no sense, i think i am going to experiment cause it needs new cats anyways.....and taking off the cats is illegal of course, but they dont do inspections in GA, and about the horsepower, your telling me that a less restrictive exhaust doesnt give you more power?, i know that if you dont have enought back pressure you will lose torque, but i highly doubt that taking off the cats will cause it to lose torque, after all i want more horsepower, i am willing to sacrifice low end torque, for higher end power, unless you know someone that has done this and you know for a fact that it will mess up the message sent to the computer, besides telling it that the cats are in need of replacing, tell me, otherwise i might have to experiment......i'm not trying to sound like a smart a$$, just doesnt make sense to me
