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2008 Ford F-Series Select Engine

4.2 Liter

4.6 Liter

5.4 Liter M16x1.5 - Up to engine build date 11/30/07 found on cam cover.

5.4 Liter M12x1.25 - After engine build date 11/30/07 found on cam cover. 

6.8 Liter M16x1.5 -  Up to engine build date 11/30/07 found on cam cover.

6.8 Liter M12x1.25 - After engine build date 11/30/07 found on cam cover.