I have a 2000 Silverado with 72K on it. 5.3L with an Airraid intake, Hypertech, and Magnaflow exhaust. I plan to upgrade more, possibly a supercharger. I am going to buy some Pacesetter Full length headers with the y-pipe. I was wondering if they are a true bolt on with no modification to the exhaust. I know they get rid of the cats but does the pipe take the place of the cats? What about the O2 sensors? Any help is appreciated.
Thanks,
Keith