ok i have to change the plugs on my truck last set i put in were bosch platinums. which worked ok for the past couple years but i am starting to feel them not work so good :P
so now starts the question do u guy think that the NGKs are worth the money? if not what do u recomend i used in my truck this time ?

 

I'd stick with good ol copper core if it came with them originally. I know on my 05 (4.7L), I tried platinum and the truck ran like doodoo. I just used champion copper core and changed them every 30k.

 

another question i have is do u think i should change more coil packs ? since they look pretty old?

 

If they are not giving any issues, I wouldn't.

 

There's no need to change a coil pack unless it fails. Aftermarket coil packs are probably more "junk" than the OEM.

X2 on the Champion Copper Core. Copper conducts better than any of the other materials out there and the coil packs were designed for them.