Thin Wall Spark Plug Socket

Tjhoward84 said

Those are the original plugs that came with the engine. The engine sat on an engine stand from 1998 to 2013 waiting to get installed. I did not have the car during that time frame. The engine was installed in the car and started in Aug. 2013. I have never touched the plugs as the car runs great and only get about 500 miles put on it a year.

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A plug can be correct in every way but the size of the hex. If you had provided the part number I requested (it's partially visible on the side of the plug in your pic), I would have told you the hex size, so you could modify the right size socket to remove them as so many have suggested. It isn't 20mm. It probably is 13/16". These are the wrong plugs because standard sockets won't fit. Once you have a tool that will fit, you can put the wrong plugs back in if you want.