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Message: <blockquote data-quote="Jrgunn5150" data-source="post: 164358" data-attributes="member: 9682"><p>The power gain on the heads comes from compression. I understand that. However the fact that you can easily bolt aftermarket cams in the stock heds (pi), and the intake actually matchs the ports is the main bonus from my POV. Now I do know the facts, ported NPI whoops ported PI in a NA contest, and SVO heads flat out own. But for the guy in his driveway, the simplest easiest thing is still to swap it all, get a nice 40-50 rwhp gain, save a few more weeks, through in some comp 262's or whateer, and be close to 300 rwhp with minimal effort, and with resorting to expensive porting, head work, or retainer's.</p></blockquote><p></p>