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Message: <blockquote data-quote="shine1stang" data-source="post: 644801" data-attributes="member: 10450"><p>well to tell you the truth the single port heads can be made to flow just the same as the split port heads. Both being ported as much as they can. Per supersixmotorsports specs the difference is only 20cfm on the intake side, and the single port exhaust side will actually flow more than the split port. Now i dont have the stage 3 yet, and could yield a lil more by stepping up. But if you look at my overall combo its more impressive running a stock ported upper with a 56mm tb than the heads alone. I have the bbk tb that was port matched with the stage 3 upper. Remember that the stock tb was also 56mm. So even with the porting i wasnt gaining that much in flow over stock. And stuffing 20psi thru that and running what i ran was more impressive than anything i think.</p></blockquote><p></p>