ok i own a 2000 silverado 4.3L Vortec engine. last year i put true duals, no muffler but the cats still there. the cats have been burned through and are jut pipe basically now. anyway the o2 sensors along the right pipe are ruined one is cut off and the other is melted to the pipe. the right pipe is questionable. anyway i recently put a cold air intake on with stock tubing. i used the old sensor thing with the electrical plug. i decided to just run the filter literaly on the intake manifold. the truck actualy runs and the service engine soon light went off????? so i took it for a drive and it runs great!!! better than ever and i can hear the filter. i like it but i noticed my transmission cause its auto that it is shifting a lot smoother and actualy faster. like short quick shifts.!! i plan on running it like this permenantly is that good idea???
I think your check engine light just burned out! Go to an auto parts place that checks computer codes for free. You probably have several codes, but the computer is managing the engine on get home settings. You vehicle will not pass inspection!
They will cost more than you will gain back. Cold air intake is about $370.00 and exhaust is at least $250.00. If you gain 1mpg it will take a while to get it back.
