so i put my ls on the lift at school and looking under it i realized there are 3 catalytic converters and 2 of what i think are resonators before the mufflers, as i am a kid and emissions and noise are not the biggest deal to me, and more power is, i was thinking about removing the first 2 that come off right by the engine, then the pipes converge to one, go through one more cat, then split again to go to the resonators which i was also planning on removing, thus hopefully relieving the engine of some resistance and increasing power maybe. i was thinking there might be some o2 sensors around there as this being the car that it is may have a few, has anyone on here done this, or know if there are o2 sensors around these areas? or know if this will give it some power, or just make it louder