I never had a problem running my O/R X ... just turned the rear 02 off and Ford never says anything to me about it.

 

Get caught driving without cats in NJ & your walking home, they'll tow it in a second, I suppose many other states too. Just cause your state doesn't do emissions testing doesn't mean the cops will look the other way.

 

never heard of them doin anything about it here in texas
sucks elsewhere though

 

Apparently, Brent claims 11 hp after a tune.

Now, when I placed my order for the o/r H pipe with Brenspeed, Brent told me that not all S197's throw an oxygen sensor code with the o/r H in place. After a few days, mine eventually did. I sent my tuner back to Brent and he made the adjustments.

 

jeez, come on just give them up for adoption, maybe they'll find a good home[8D]

 

if you get a good exhaust set up then you dont need to take them off. if anything just get high flow cats

 

but the o/r pipes sound soo much better

 

You can see my exhaust set up in my sig - my dealer hasn't ever said a word.

edit: Even when I stink up their garage. [8D]