Labor Day down the crapper....

[stangGT97]

Those are stock replacement? Does anyone know the part # for the new improved plugs that are 1 or 2 heats ranges cooler?

I believe it would be a AGSF-22C plug for 1 heat range colder.

what about the NGK plugs cause that is what i have on right now had them on for 4 months now.... and what is the TQ. spec???

I torque all mine to 12 ft-lbs w/ the cylinder heads cold (usually after car has been sitting over night)

 

[the98stang]

what about the NGK plugs cause that is what i have on right now had them on for 4 months now.... and what is the TQ. spec???

Most of the other plugs don't have the same problem as the old motorcraft plugs. I remember comparing my Autolite 103's to the motorcraft, and there was TWICE as much thread on the 103s. The longer threading holds it in better, as well as the shoulder mentioned.