LTH + O/R X-Pipe - 3.7L V6

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You can no longer get a tune from anyone when running no cats. No tuning company will do that for you anymore. This is why offroad pipes are no longer sold since the Fed has cracked down on no cats in the past year.
If these "extenders" that you have don't fool the PCM then your car will run like crap. It won't run ideally anyway because with them in place of normally functioning O2 sensors and cats it will keep the PCM stuck in permanent open loop and therefore won't make the adjustments that it needs to the air/fuel ratio and timing. That will cost yourself HP especially without a tune to compensate so there is nothing to be gained by running no cats, only losses. My suggestion is to scrap the idea and the offroad pipe.
If your state does emissions testing you would fail and you also leave yourself open to very hefty fines if a cop bothers to ever look under the car with a mirror.
If you want the long tubes on the car then my advice is to look over them for a stamped part # so you can identify what brand they are and then buy the matching catted mid pipe for them. If they're generic Ebay long tubes then you might be out of luck.