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I find it kind of odd that, only a few years ago Comp used to recommend not using the XE cams for actual driving, street, power tour and so on.

If a person picked up the phone and called, they'd say no way, it won't work...use an old high energy or magnum grind instead.

Then a few years and many magazine articles later, everyone wants to use them in everything, almost all of them make noise, and Comp says now it is OK to use them in whatever you want.



They do run well, but if you're going to have lifter noise then why even use a hydraulic to begin with?

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How do the older MP cams differ?

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The lifter moves very slowly, and most of them have narrow lobe separation because they were designed to work with the poor flowing stock iron cylinder heads of the day

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