I couldnt seem to find any threads about this mod, so I'm making one myself.
What does this mod do? this mod tricks your O2 sensors into thinking that your catalytic converters are still there so you do not throw a code when you cut them off.
How does it work? the spark plug non-foulers restrict the flow of gasses getting to the sensor therefore making it think the cats are still there filtering



Supplies needed-

• 2 sets of 2 18mm spark plug non-foulers part number 42009
• PB Blaster or some other rust penetrant
• 1/2" drill bit and a drill
• 19mm wrench
• a set of channel locks
• ratchet with an 8mm socket
• a very small flathead screw driver

to start out, unhook the negative battery cable using your 8mm socket

now get under the truck and spray the living crap(for lack of a better phrase) out of the o2 sensors with your penetrating spray

while the PB is doing it's job go get your spark plug non foulers

and drill a 1/2" hole in the end of two of them. Careful not to booger your threads. This hole allows the top one to screw over the tip of the sensor shown here


After you have your holes drilled go inplug the sensors, use the little screw driver to pop the prong on the plug and relese it.

Unscrew the sensors from the pipe and take them out.

put the drilled out fouler onto the sensor first, tighten it down, then put a non drilled one over it and tightnem it down as well. it will look like this before you put it back in


Now screw it back into the pipe, tighten it up, then plug it back in


All thats left to do after that is hooking the battery back up.

Before I did this my CEL was on, when I started it up after this it promptly went off. As usual, if You have any questions I am happy to help

 

I agree with this write up. I did the same thing and it worked like a charm, has for alomst 3yrs now

 

Glad it'll last, wanted to spread the word since this comes up alot

 

Jw how does it trick it tho I did it this morning
I kno it moves it out of the airflow but. Well Yea lol does heat trigger it to then on or something

 

Sweet right up. Ill pass this on to my friend with deleted cats. Ill be using my tuner to turn the code off, not bragging.

 

Now idk what state you're in but nj emissions they stick the sniffer in the tailpipe, has anyone passed emissions with this done

 

This does nothing to the actual emissions content of the exhaust gasses so it may or may not pass the sniff test. Depends on how dirty the exhaust really is.

 

Say what? Little lost here lol

 

-.- gf can't translate Haha
Umm how are the o2 sensors triggered

 

Most inspection stations are really strict in NJ. A bunch of my friends have had their cats removed and they get failed because of emissions, but i do have some friends that have passed.