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Message: <blockquote data-quote="Snorky" data-source="post: 1498588" data-attributes="member: 29157">Both of you have some valid points. I myself have done the blower and cams. Then forged the bottom end. Then added ported PI heads.  I will say I wish i spent the extra thousandish on TFS heads. Would have cut down on predet. Risk under boost.  Plus it out flows ported PIs with ease. Plus it eliminates the plug boss and swaps the intake valve to the other side of the cam shaft, plus better valve angles.. and wait.. is that all you say? Replaceable cam towers??! NO WAY!!!  And it holds decent resale value??!  Yeah right.. must be some MAGICAL head...On paper. Boost is the cheapest easiest route to quicker power.. but those TFS heads are no joke, especially under boost. I remember back in the day y2k2gt on moddedmustangs went from ported PIs to Ported trickflows on his twin turbo car on the same boost level, same fuel and picked up some 7 mph trap speed. CrAZYYY</blockquote>