Sure there is, gut the mofo's
undo the cat-back, see if it's the main cat first. I had a "high flow" dynomax bullet cat go bad on me within 100 miles of it's install and my whole exhaust system was glowing red! I gutted the POS and everything was back to normal.
If it's not the main cat, it's the precats. Either gut them after removing them from the car first (I have a set already gutted and in high temp primer that are waiting for someone to pick a color of high temp paint, and a new home
MIL eliminators too) or get your mits on some MSDS or Weapon R's if you still can.
This is the best reason to add high performance mods
FYI, My 2.5L ran like crap after it's UIM/LIM/TB cleaning for a few miles. But, it cleared right up and ran great.
