OK, first a caveat - wind on the front of any bike with a fairing is a complex thing and all of the elements - fairing, windscreen, lowers, soft lowers, etc work in concert to either make the rider more comfortable - or not. Case in point, prior to this year's run to Sturgis I purchased some of the "summer width" soft lowers. Did they work? Sure as long as you keep you feet on the floorbaords, as soon as I put them on the highway pegs the bottom of my pant legs would get pushed up over my boots... not a good look. Fixed the problem with a couple of big rubber bands.
My take is that on my 2010 FLTRX, with a 14" Windvest they help. My problem was buffeting, particulary when wearing a helmet at 75 to 85 mph. The deflectors for my bike have definitely helped with this problem and were worth the $30.
As far as fitment is concerned what changed was the diameter of the front fuel tank mount, apparently due to a recall as described eleswhere on the site. The mod I described will allow you to mount the deflectors on a bike with the larger diameter tank mount, albiet further away from the frame as they now go outside of the tank tab as opposed to inslde. With the pre-recall design they should fit just fine.
