using vinyl bodywrap to place fake ducting on the bodywork, to distract the competition about the race car design

A set of louvres, a brake duct and a engine cover air extractor all appear in the image above, but all of them are fake simply printed on the wrap in an attempt to throw onlookers off the scent.

http://www.racecar-engineering.com/blogs/how-cadillac-tried-to-trick-the-motorsport-world/