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)?

 

well most reasonable way would be ebay,check the link, I have 1999 f250 and I think I'm going to get one for my self too.



http://cgi.ebay.com/ebaymotors/Ford-...QQcmdZViewItem

 

CompCams has really good cams and such for the 5.4L.
You might check dssracing or sean hyland motorsports for other internals.

 

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.

-Kerry