off road x-pipe on an 03 cobra?

You'll need MIL eliminators, or you can turn off the heater bank downstream / 02 sensors with a tuner. If you're able to hook up your tweecer to the car that should be able to disable it also.

Do a search, there are a few threads on home made MIL eliminators you can put together yourself for cheap and save a few bucks. I went the lazy route though and spent the $50 to have them sent to me before I had my tuner.