Originally Posted by bansheeracer33572

hes right about the cat, its not a filter, its a honey comb, what it is is a comb made out of ceramic, the engine ehaust heats up the ceramic causing the material on the ceramic to get hotter and to burn the rest of the fuel out the ehaust thus lowering emissions....also, if you would have emptyd out the cat in your garage like i did you would have also found that there is a good amount of pure platinum inside the cats, it is a free mod and it does increase horsepower and torque, but it can through off the 02 sensor if you have downstrem sensor, i learned this from the cat om my first car, a 1997 chevy cavileir( peice of **** at that). oh yeah, dont breathe in any of the dust it will hurt you.