GRQV-0556613771

Luckily I thought to go back and read the reviews on this product after I ordered so when I couldn't get them to screw in easily I knew what the problem was. Upon comparing one to the OME plug I could also see that the threaded end of the new plug is not as long. Had I not gone back and read the other reviews I might have kept trying and damaged the threads on my motor. I'm not sure why they say these match my 2003' Town Car.

I bought these for a 2003 Lincoln Town Car Executive with a 4.6 and they did not fit even though they claim they will. The head was too big to go low enough to grab the threads and the threads are about three sixteenth of an inch longer then the factory plugs.

I purchased these a while back in anticipation of changing my plugs when the weather got better. Waited too long. These plugs will not thread into the head on my F-150. I tried several ports and different plugs to make sure that it wasn't one particular plug or cylinder. None of the plugs would thread into any of the ports for the plugs, Champion plugs thread right in. Can't return them now so I guess I can use them as weights for fishing or something.

did NOT fit my Mustang, I had to go down to the parts store and buy some Motorcraft plugs, probably like I should have in the FIRST place!!!

so far so good!

WTF.. I have my throttle body off, my fuel rail... my car is torn apart, and these plugs wont thread... severely disappointed and angry..

My mechanic said he had to re thread all 8 because they wouldn’t thread in.

Kinda liked the quality of the plugs... not sure on the life of the plug but I will say make sure to gap these to your vehicles specs... I forgot to and my truck ran like crap until I did... Better Now..lol