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1993 Ford Mustang Ford Racing Performance Boss Engine Port

The hand-ported runners improve airflow from 251 cfm to 295 cfm at 0.600-inch valve lift.
Ford Racing Peformance Parts Boss 302 Engine Build - Reptile Resuscitation

 The hand-ported runners improve airflow from 251 cfm to 295 cfm at 0.600-inch valve lift.  View Related Article

 

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