Highest flowing sbm heads?

Killer6 said

Sorry to tag Ya with the red X, engines are NOT just air pumps. Not even close. There are heads that are out-flowed by 15-20cfm by another head for the same app, but will spank 'em handily, fact.
Otherwise, pretty much agree with the rest there, carry on! :steering:

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Except they are, and in this particular case the rod lengths are damn near the same for the same stroke too.

Head flow, and more importantly flow quality, is always a variable even when makes are the same and doesn't really change the air pump part of things..

The bigger mistake I made is that I somehow read it made just over 700hp, but in reality cranks out 825+, and so the compression etc is all an entirely different game...