+3 to what Ron and Lance have said.
Take a good hard look at the RGU windshield profile (see my signature pic below).
It looks like it was made to swoosh air right into your "space" (unless you're about 5'10" high or less!). Some would disagree, and that's fine, but I think the OEM shield is not good at 55 or more.
IMO, it was made to be replaced. And there we're in luck, because there are so many good options to choose from.
I had a WindVest on my '11 RGU, and they make good shields, but I liked the customer service way better with John at Freedom shields and I think the product is slightly better also. I have a 15" from them (recurve) that forms a wonderful air pocket at 55 or more, and the vents on the RGU provide a nice gently breeze that cools me when I need it!