measurements
I can measure the cross sectional area but I feel these are very similar to my edelborcks with 2.19 valves and they work great. For a street/mild race combo I like a little smaller port to help keep the velocity up. If these respond like other heads I think just changing to the 2.19 valve is good for about 8-10 CFM with the basically stock port. I don't currently have access to a flow bench to test these so I will have to do some real world testing once engine is in the car.
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