Just wondering witch would be the best spark plugs to use on my truck.I already tried the autolite xd iridium but my truck went true them in about 4 months.Wondering witch one would be a better spark plug?

 

Go with the factory Motorcraft plugs or a set of NGK Iridium for that application, another good choice would be Denso iridiums.

 

i have been herring alot of NGK so i think imma go ahead and try them.

 

NGK TR-6 gapped at .032

 

Really depends on if you're modded at all svtallday. Typically if your truck is unmolested then stay with the stockers. If youve added any addiditonal boost (4-6lbs) then most that have go with TR6's gapped somewhere around .32-.34.

 

0.032 - 0.034

 

Yep, that's what I meant!!

 

poor truck, does it even have a solid tune???





NGK TR6's gapped to your boost level or the stock motorcrafts are what you need

 

yeah tr6 are my best bet since truck is fully pullied lol

 

were still working on tune,what would be a good gapped for 13-14 psi

 

You're still looking at .032 - .034 being your best bet for that boost range.