Quote:
Originally Posted by Txjake
and, from what I read, the 4.6 2 valves have a regular one piece spark plug. still potential for cross/stripped threads if not changed correctly, but not as bad as some of the modulars.
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Correct. You have to go for the three-valve engines for those weird plugs. I don't believe that the 3-valve head was ever used in automobile applications. It didn't even exist in 1999. The 5.4 2V tritons had more of a rep for spitting out sparkplugs.