No, as far as I can tell, the ECU isn't smart enough to give a CEL due to O2 sensor readings with the header mods.
I would not suggest doing the header mods without tuning better than the TORS tune. If you look at TighTL's dyno graph on the is site, you will see that he is dangerously lean in the midrange using the TORS tune. The TORS tune does NOT have enough fuel in this area, IMHO, let alone when you improve airflow throught the engine with header work.
I suggest tuneboy or a custom tune with a PCIII.
I would not suggest doing the header mods without tuning better than the TORS tune. If you look at TighTL's dyno graph on the is site, you will see that he is dangerously lean in the midrange using the TORS tune. The TORS tune does NOT have enough fuel in this area, IMHO, let alone when you improve airflow throught the engine with header work.
I suggest tuneboy or a custom tune with a PCIII.
