Here are some of the parts that recently made it onto the 6.4L destined to power International Threat...

 Over the weekend, the top end of the engine was fortified to the best of our abilities: Elite Diesel Stage 2 chromoly pushrods, A1 Technologies' H11 head studs, OE hydraulic lifters (to work with our Elite Stage 1X cam installed in Part 2), and cryogenically treated factory rocker arms. We've always felt (in 6.4L, 6.0L, and 7.3L engines) that the rocker arms leave a lot to be desired, and they're known to become a weak link in high-rpm engines, such as ours will be. Cryo treating the rocker arms is said to add 30-percent more strength, and the folks at Maryland Performance Diesel told us their broken rocker scenarios came to a hault once a cryo'd set went in the company's 10-second, crew cab F-250.

 A set of Elite's Stage 2 valvesprings (not pictured) were also installed in the heads.