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0505em Cadillac 16 Z

Cadillac designed efficient ports with high flow rates and velocity. There's room for improvement, though. Johnson offers several porting packages dependent on the state of tune. The left photo shows a modified intake port, the photo at right shows a modified exhaust. Up to 50-cfm increases are common.
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Cadillac designed efficient ports with high flow rates and velocity. There's room for improvement, though. Johnson offers several porting packages dependent on the state of tune. The left photo shows a modified intake port, the photo at right shows a modified exhaust. Up to 50-cfm increases are common.  View Related Article

 

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