well, im guessing you talking about removing your catalatic converters? it very simple and easy to do, either find a back woods exhaust shop to cut off the cats and weld in a piece of pipe, or buy yourself an off road H-pipe or X-pipe. after you purchase the pipe buy what is called MIL eliminators, pretty much any speed shop in the area will have them in stock or order them off of www.uprproducts.com, they have a nice set-up that you just plug into you stock harness and its ready to go. after you get the pipe on you put the MIL eliminators in between you O2 sensors on the mid-pipe and the factory plug on the harness. its really simple, you have any more ?'s just ask.