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Message: <blockquote data-quote="Jrgunn5150" data-source="post: 252844" data-attributes="member: 9682"><p>Compression height is the distance from the center of the wristpin to the top of the piston. It has no bearing on compression ratio. If the 4.6 and 5.4 use the same rods (I don't know if they do or not) they can't have the same compression height due to the different strokes, which is why I asked. One way or the other, either rod's or pistons will be more expensive for the 5.4, due to one or the other being unique to a rarely built motor. I'm just curious as to how much?</p></blockquote><p></p>