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I posted a close up picture of the port holes on my CXS in the Buick Vehicles in Production gallery. They do go through the fender. On closer inspection with a flashlight, they are "open" but I'm not sure if they actually vent air from the engine compartment, since I can't see much through the mesh.
As easily amused i am i found out that the V8 lucernes have 4 vents on each side and the v6's only have 3 on each side one for each cylinder . jsut an FYI
Had my buddy do this for me looks good i think