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where can i find the "new improved" cylinder heads for a 5.4l? the ones with more than 4 threads holding the sparkplugs in?
or any other high performance parts(like cams,valves,ect)?
Perhaps a better way of phrasing this is "what is the casting mark for the 2002-2003 PI heads?"
My question is "is there a difference in casting marks?"
I'm not too sure there is a difference in the marks other than left and right have at least the last digit different.
Remember if it fits on a 4.6 Windsor, it should fit on the 5.4. That's why I do searches in the Mustang realm for new and interesting stuff for these engines.
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