Originally Posted by Ghost23

It will work on any vehicle. I did it to a Mazda 3 we used to have. The rear sensor does not effect air/fuel, only the first sensor. The second one in the cat or after the cat is to tell the computer if the cat is working properly. All it does is sense that the cat is doing its job right. A clogged cat does not, so the sensor should pick up on that. I had 2 jeeps that the cats got clogged so I cut them off and did nothing with the o2. Had a code all the time but didnt effect anything at all.

All the antifouler does is keep the sensor clean, hot, and out of the unburnt exhaust. This way you dont get a code.

Originally Posted by danetbra63

So this is from the gotts 02 mod how to:If I plan on putting long tube headers onto my 4.6 4wd, what happens to the second set of 02 sensors? I'm looking at the pacesetter long tubes and they already have the nuts installed for the front two o2 sensors.
So do the second set of them just hang there or what? Is that going to throw a code too?