[barnesql]

TJBUSA is right, the 02 sensors are now in a different spot, and will throw a code with any LT headers. I suppose you could somehow drill in a threaded hole for an 02 sensor if you want....but most guys have them turned off when they get a tune. But it is not the cats I do not think that throws a code...just the 02 sensor.

I have had my headers and new catback on for about 3 weeks, but I needed a new camshaft and my tuner wants me to wait a tad longer before I get it tuned. It seems to run fine without a tune, but I am sure I am missing out on some power until I do.