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99 or 99.5?

1288 Views 8 Replies 8 Participants Last post by  DieselDeaf
I have an earlier 99, production date 7/98. And I can't seem to figure out why my truck has the stuff it has. Th updated airbox vented out the front, correct? It has that one, not the fender well intake. The HP rating on the valve cover is 250hp, not 215, 225, 235 like some, and I thought that wasn't available until late 2000. And If someone can help, how do I know which turbo is on my truck? It will be replaced soon soo I think I might need to know.
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The airbox may have been changed out if the truck was in for a driveablility problem. There was a TSB on it, that is why mine was the later model when I bought my early 99. Ignore the rating on the valve cover, that number only applies to the engine in International trucks, Ford modifies the PCM programming, and it does not have to comply with the engine sticker.

As for the turbo, it is most likely the early 99. If you do not have the AIH in the manifold Y-pipe, you have an early 99. The Y-pipe will not interchange between early & late 99 turbo's. Also, to upgrade to the late model turbo, there are many other parts that have to be changed out, approx $800 for all the parts.
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