No, they do not flow the same. The GT-40 still holds the advantage over the Cobra in that respect. An extrude honed Cobra upper may flow as well, or slightly outflow the untouched GT-40, but then that adds to the cost and you would have been just as well to buy the GT-40 to begin with. And the spacer is great if you're running a streetcar, but for the guys who want the option to delete the EGR valve, the GT-40 is the better choice. And yes….the Gt-40 is better looking.


