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0405htp Engine 18 Z

As you can see, the MTI heads offer a major improvement in airflow. Intake flow comes in at 341cfm at 28 inches and exhaust is 229cfm, both of which arrive at .650-inch lift.
MTI Stage III Heads Install - Tri-Power 427 -- Part II

 As you can see, the MTI heads offer a major improvement in airflow. Intake flow comes in at 341cfm at 28 inches and exhaust is 229cfm, both of which arrive at .650-inch lift.  View Related Article

 

 

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