ive managed to unbolt the whole thing, but could someone give me some tips on getting off the damn o2 sensors...i tried vice grips but i cant turn it....please offer suggestions, i appriciate it

 

unplug both of them. then use a monkey wrench and some kind of extension. worked for me. HTH

 

how do you unplug the one on the exhaust side -- it goes up into the car on my g3...thanks

 

see i cant get it unscrewed out of it just using vice grips --- you mean unplug the wire from the housing up a bit higher correct? thats what i thought to do, but i cant get to the other one by the exhaust

 

anyone

 

remove the heat shield from the cat then you can get w wrench on the O2 sensor and unscrew it.

 

i got it guys, i appriciate it. i unplugged them both and took out the o2 sensors when the cat was out...i was afraid it would sound like ****, but with the dc sports its sounds great and clean (its a non resonated testpipe as well).