What do you guys gap your plugs at? I have a 4# lower if that matters. Also, they are NGK TR55ix's.. how do i gap them w/o breaking off the electrode? Thanks alot

 

Yes, extra boost makes a difference for plug gaps. With a 4 lber, I would gap at about 0.039-0.040".

I've never seen those plugs but if they're Irridium as I think they are, then touch nothing but the ground electrode and form it very carefully when gapping. Get one of those circular-shaped gauges with wire for the various gaps. It will have 3 or 4 electrode 'formers' as part of the gauge. Never check plug gaps with a feeler gauge---if you want the gap to be correct.

Dan