Thread: rear o2 sensor

Originally Posted by boostedgtp2003

well i already took the cat off...... so what wld b my best bet for fixing this withput having to buy a cat, do you think it would work if i just put an o2 sensor back in the pipe without a cat?????

It might work if you put a bung on the pipe, then a 1-2" extension from that bung and screw in the rear 02 to that. The idea is that it still sees enough exhaust to function, but does not throw a code because it is not placed in a free-flowing section.