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Message: [QUOTE="jus10keith, post: 1371435, member: 10504"] Navistar was machining "service" heads for the 6.4L up until they shut down the V-plant in Huntsville in 2014. They were sent to Cat-Reman and divvied up between whatever dealership ordered them. Also, as an FYI, they ran 6.0L until then too, just in a limited capacity. If you're talking about the 2011 up CGI block 6.4L, NO. totally different intake side on the head and no glow plug holes either. The valley area of the block is completely different also. (It was actually referred to as a 6.5L to differentiate between models.) If you're asking about the 08-10 6.4L Nav engines, same head and same block as Ford 6.4L. [/QUOTE]

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