Thinking of getting headers; but Austin has emissions testing as part of the annual inspection. I've heard people having all kinds of results with tuning. Anybody in an emission check county with headers have any luck?
I'm in the DFW area but no emissions just a vehicle inspection. Haven't had any problems, still running cats and the egr. Came from CO and never had any trouble with my old truck with a complete dynatech system, they actually put you on rollers and go through the gears/rpms to measure emissions.
DFW does have emissions test on our trucks via OBDII connection on gen 2 Lightnings. They will pass with one “not ready”. If they do a visual and see any of the cats missing they can fail you on the visual, same thing if the EGR is deleted. When I had my 2000 with a 2.3 Kenne Bell and supporting mods I passed every year with 1 not ready and I never saw saw them look under the truck or under the hood.
The headers are not the problem and will not throw any codes.., It's when the user doesn't install the catalytic convertors. This will throw 2 codes. Bank 1 and Bank 2 downstream O2 sensors.
They do make a downstream O2 simulator (aka MIL), which will tell the computer that A/F is good. Google it!
Do NOT remove the front O2 sensors, these control the A/F mixture, removing these will effect the drivability.