Quote:
Originally Posted by 74GTODude2
Well which heads are better to build 4X or the 6X?
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According to Rocky's in-depth testing, 4X heads flow no differently than 6X heads, either in stock form or when worked up effectively. So either head of the appropriate CC will get you where you want to go. Which works in your favor as most people consider 4X\4C heads to be doorstops and scrap and the 6Xs are worth their weight in gold - when they are pretty much the same head.