cat code - should I care?

[ericinboca]

I installed a Stebro racing exhaust in Dec 07 with secondary cat bypass pipes in my 04 986S - a dedicated track car.

I have four track days on it after making this change, and got a check engine light today for the first time while driving it around leisurely to warm up prior to an oil change. The code is P0340, Catalytic Converter Conversion Too Low (Cylinders 4 - 6).

I do not know if the new exhaust is related to the code, but it is suspicious. Even if it is not, and it is a bad cat, should I care? The car does not have to pass emissions tests. If a cat is bad, versus the mod somehow causing it, am I doing any long term damage to the engine if I don't replace the cat? Am I doing any damage either way?

[tholyoak]

If it is a track car why not simply program the car with the ROW maps and it will ignore the post cat sensors that measure cat efficiency?