Re: Question regarding cat removal.
"The 3rd gen has the honeycombs and cat built in, so if you ONLY swap out the can, there's not enough change in the system overall to warrant a fuel management system."
3rd gens run lean too from the factory. Not to mention, most slip on systems remove the Exup valve changing the characteristics of back pressure. So there is a significant change.
Any change will alter your air fuel ratio. It comes down to how much do you care about your air fuel ratio being 14.7:1 Running lean, runs hotter, less life. Running rich, fowling out plugs, clogging said catalytic converter, fouling 02 sensors and excessive carbon build up on the engine internals.
Last edited by shnormo; 02-02-2010 at 04:54 PM.