- Dorman 42109 Extended Spark Plug Non-Fouler - Universal Fit, 2 Pack

Perfect item and fit. Works like it should.

We all know why we are here… in my case it worked great! Can confirm no CEL on a 718 Porsche Cayman S after 1500+ miles.

These adapters showed up quickly and seem to be well made. I bought these because they were they are suppose to help in relocating oxygen sensors on one of my vehicles that I keep getting check engine lights and code PO420

Besides the fact the delivery drive can't read and delivered my package to the wrong apartment and someone else's package to my apartment. Everything was fine after I located it. They complain about wages and yet still can't do their job right? Anyways, after properly replacing my Cat with a new manifold cat on my FJ, NTK upstream, and Denso downstream. I just about had it with this P0420 code. I cleaned my MAF and my engine is running perfectly fine. Everything done to textbook service yet my O2 sensor kept reading irradic on B1S2. Reason I had to replace it in the first place was a Coil pack blew out on my Bank 1 side and it caused unburned fuel to ruin my cat and sensors. So after all that enough is enough. Put a Extender on B1S2 and it has smoothed out a bit and should be good. What's messed up is the cat is working a Voltage rages are within .1-.9 thresholds but the problem is the frequency is too frequent which can trip the code and when a FJ cruiser has codes on it disables a bunch of driving features. And doing a one wheel peel in the rain while turning on AT tires gets annoying after awhile. The pending code which was storing almost immediately hasn't popped back up yet so I'm assuming it should be good. If it doesnt I'll have to shove some steel wool or something in the spacer to smooth it out more.

Would not work as oxygen sensors for the exhaust on our 2002 Nissan Pathfinder. Not enough room.

My 2004 Honda Odyssey has an aftermarket catalytic converter after it was stolen. The muffler was also so old and rusted it was leaking massive exhaust, all that lead to a P0420 code. The extender fits the catalytic o2 sensor, however, not sure if it's due to the aftermarket version but the o2 touches the subframe. This is not ideal as over time I'm pretty sure the subframe metal will rub and break the o2 sensor or wear the wire out. This will only be a temporary addon while I take my time to fix the muffler and any other exhaust leaks. Installed this extender, reset the OBD, and took it to the Inspection station and passed immediately! Keeping this handy for when this same car has be inspected every year.

We all know why we're all here. Yes, it worked perfectly. Yes, it was easy to get on. Removing the O2 sensor is another story...but once I got past that insane obstacle, I was ecstatic to unwrap this thing and finally be done with p0420.

Used to space out both oxygen sensor aft the catalytic converter and got rid of my 420 code

To be honest, I discovered it is illegal to use these devices, as I intended. Parts are excellent