Just installed mine and they work great. 
If you are thinking about getting some, bookmark this thread there are no instructions.
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Waiting on the Z35! SOLD - 2011 Gun Metallic Touring 7AT w Sports Pkg & Nav, Nismo Bumper and Rims, RC Grille, RC Brake Ducts, H&R Spacers, Painted Door Hdls, GTR Start Button, Nav By-Pass, EVO R Fog Light, CF Ducktail, CF Interior Trim
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