After porting, the 906 heads flow an impressive 313.1 cfm on the intake side and 223.5 cfm on the exhaust side at .600-inch lift. Using the rule of thumb that cylinder heads have the potential to ...

Port Flow Analyzer – now available from SuperFlow Technologies Group – is a computer software program designed to streamline recording, calculating, reporting and graphing of cylinder head ...

Wet flow testing has moved in ... deeper than is seen on the original Pro 1 head. This has the effect of turning the charge more as it enters the cylinder, thus generating a better swirl action.