Originally Posted by cubic_inches
it would be better to keep the gs-r head, it has better mid lift flow, the b16 has better high lift flow, but it aint gonna benifit u more than mid flow numbers
You have it backwards. The two heads flow almost identically, with the GSR flowing better at low valve lift, and full valve lift. It also has smaller combustion chambers which result in slightly higher static compression.
Here are some flowbench numbers from Alaniz.
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
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