Changed my plugs to the stock NGK-LZFR5C-11 from Rock Auto for $3.53 each, not a bad price but what a pain in the xxx to install!!
Took me about 2 1/2 hours. Started on the Drivers side front and worked back. Kept the coils off for more room to work. The last one #7 was a ball breaker. Thought that was the hardest till I got to #8 on the passenger side!!
The Computer Harness and heater hoses go right over the coil.
Had to unplug the harness and undo the clamps holding the hoses so I could move them enough to get at the coil.
Thought my F150 was tough. But I'm good for another 32k miles.
The only tougher plugs I've changed was on a 68 Shelby GT500 in the olden days. Had to change them from under the car or remove one engine mount at a time and lift it just enough to get at them, no lift of course.
Dodge Dealer quoted me $380 bucks so it was well worth it.
Oh well, good for another 32K
PS. Anyone who is going to do this, I recommend you get a magnetic socket 5/8" and several different length extensions and a swivel to get some finger traction.
Noticed it is idling much smoother.
Anyone notice when the computer is first reset, (off the battery for a while) the truck has more balls? I stomped on it and it roasted the tires. Normally it won't even with the trac control off. Something to be said for what the computer lets you do!!