CNC machined head porting at GMG.


Gone are the days of hand porting


We now digitize and equalize each cylinder chamber for optimum flow.


Here are some bare heads having the work done.


In addition you will see the heads have been machined for our upgraded head gasket and sealing system.
















Please feel free to email me with questions.

 

Can you provide the before and after flow numbers for this cylinder head at 28" of water? Also, which cylinder head is this to begin with?

 

Heads are from a 997 TT and I will check with engineering on the flow rates and get those posted up.

 

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Nice work!

 

about time this happened. interested to see if any gains?
i'd imagine these heads flow pretty well from the factory.