Everyone: If you have more that 15K on your plugs when you pull them to re-gap, replace them! And they only take 11 ft/lbs of torque to install which is just above finger tight. More than that, they will crack and you will have miss fires, and possible rough idle.
The plug Ford uses now is the SP-534.
I say replace them because mine were shot at 40K. They are not the 100K replacement item that your manual says they are. I plan to replace every 35K now.

 

Even though I replaced mine with sp534's in June and gapped them to .028, a couple of days ago I pulled mine and narrowed the gap down to .025. Didn't really change the idle(it was already smooth) but now I've found in my so far limited driving that it holds boost a little higher when you jump on it and just possibly may be getting even better mileage since going down to .025.

 

That's on T4, no?

 

I'm getting mixed reviews on which plugs to use ... Brisk are what I was going to do ...

 

Good choice I like them they work very good with the T4 tune.

 

If you had a 2013 truck would you check the gap and swap?

 

Without a doubt.

 

Absolutely. My 2011 came from the factory with six plugs, six different gaps. Unless you're confident that Ford has stepped up the quality control in this department, I'd check them.

 

I don't have the T4 tune yet... I'm still currently running the canned 93 from the SCT LW.... I want to get a custom tune from Shawn but just don't have the cash yet ... And it's a pain in the *** for me as I'm a apple user ... Damn you SCT !!

 

Boot into Windows on your Mac...
I had to dig out a dinosaur laptop to use my sct device.