I just installed a Weathertech hood deflector, and can not believe how much noise it creates at the top of the windshield. It sounds like hail is hitting the front of the roof pretty constantly anything much above 70 mph. It would seem it's redirecting the airflow so that the front w/shield side moldings are slapping around, but they're good and tight. Unfortunately I am going to need to remove and return it. Too bad, I wanted to keep stone chips off the front of the hood.

Who has installed a hood deflector on a NBS Silverado/Sierra that is not creating noise? Which brand is it?