http://lanouette.net/pages/english/gtsa.htm I would say, yes I feel it does a difference, but to be sure, a would need to do a DB meter test. The Theory was, if you let some air in front : 1 : Less air will go around and up the shield, 2 - By reducing the pressure difference in between the calm air of the bubble and the air outside of the protective area of the windshield would reduce the buffering. I used a gold wing vent that I had to cut in the middle to accomodate the higher curve of the GTs windshield. It's not very pretty upclose. I thing that the vent from clearview would probably fit better. Richard
