| anything to worry about when we saw it finished (specially since it keeps the stock "foam" that is located at the interior of the bumper...Not vents needed in our opinion. I you check around, 90% of the aftermarket bumpers available for the Z has the same "parachute"...Maybe if you usually get to 350 MPH, I will suggest to make some vents :) 
   
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  VIDEO OF MY BLUE Z (Right click and Save As...) 
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