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Porting heads is a skill. Anyone can gouge the ports to huge sizes, but it takes expertise to make the port efficient. Fox Lake does a balanced port job, and a CNC-machine is used to make each head identical. The intake ports' cross-section comes in at 1.67 inches after being run through the CNC-machine. Stock, they measure 1.500. Port height is 1.97 inches in ported trim versus 1.83 inches stock.