Quote:
Originally Posted by cmitchell17
If the exhaust ports in the heads on GENV engines are always blamed for low flow, why do you think GM only increased exhaust duration? (and I think exhaust lift too?)
I guess it's for exactly that reason, to try to make up for the more restrictive exhaust port?
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To accommodate and optimize on the less restrictive exhaust of the C8 is what GM says. Does it have anything to do with dealing with the head ports better? Maybe?