alltrac

What the factory sparkplug gaps? And if installing the NGK iridiums LFR7AIX, what should they be gapped to?

AgSilver

They're preset . . . don't mess with them.

alltrac

Including the NGK iridiums (one step colder) plugs?

lowprofile

+1 A spark plug gapper can do more damage than good with this type of plug. If you need to verify gap, ex. you drop one, only use a feeler guage and make changes by tweaking the ground from the sides. In other words, do not force anything between the gapped surfaces.