Checked mine this weekend. All were between .035 and .040. I gapped them all down to .030. I can say that the idle is smoother but haven't had the shudder in a while so I don't know if it will help that. I do want to mention that the ceramic on one of the plugs was cracked pretty bad. I don't know what effect this may have been having but I got a new one to replace it.

 

I can absolutely feel a difference. I got on it going to work this morning with a corvette on my butt and let's say he seemed to be struggling to keep up.

 

Or he was just idling.

 

Ya probably haha

 

Check the gap on my plugs today 4 of them was .042 and 2 of them was .045

 

I will be checking mine this weekend. I have not been having any issues but I will post my findings

 

Have you had any of the misfire/loss of power issues, and if you have can you report if this has taken care of it? Did you have a rough idle?

 

I had a misfire in 3rd gear if I push it or hammer it. Have not drove it about 25 miles sense but soon far no more misfire. Idle is good now.

 

My idle is definitely smoother now. Still haven't had a chance to test for shudder but man, it seems a hell of a lot peppier than it was.
Maybe just placebo? We'll see.

 

Checked mine tonight. All six were .042 Gapped them all to .032 Runs better all around. Idles smooth as glass now. I didn't think it was all that bad before but, seeing the difference, I'm pleased.

Side note:

WHY THE F__K WON'T THE FACTORY PUT JUST A TINY DAB OF ANTI SEIZE ON THE PLUG THREADS!!!!!!!!!