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These heads were carefully ported to deliver 385 cfm of airflow at .700-lift at 28 inches of water on the flow bench. These are the "as-cast" intake and exhaust ports of the TA Stage III heads.
Setting the Stage

 These heads were carefully ported to deliver 385 cfm of airflow at .700-lift at 28 inches of water on the flow bench. These are the "as-cast" intake and exhaust ports of the TA Stage III heads.  View Related Article