correct, the big cat isn't monitored. as for legality it doesn't matter where in the u.s. you live, it's illegal to remove any of the cats on the jeep. it's not a state law that prevents it, it's a federal one. that being said, it's done all the time :rotflmao:Topless Rubi said:I read here the 3rd cat is not monitored so its loos sould not set codes, the first two cats are monitored and O2 sensors will trigger codes if they don't get the right readings or if a wire gets cut by a tree.
yea i hear metal rods vibrating in them tends to screw things up :lildevil:heck said:I can also say that all cats are gone on my jeep (not removed, the ceramic substrate disintigrated due to vibration). After 6 months and 8000 miles, I have yet to see a code.