The engine guards I had put on from the Dealer and they are the Star engine guards which is one of the reasons I had to fabricate my own parts. The OEM Wind deflectors will not fit the bike with the engine guards. The guard restricts the width of the acrylic to about 3.5" since they just touch the guard. If you wanted to get creative you could make them 1/2" wider and notch around the guard. These weren't difficult to make. I used a hole saw to cut out the radius on the top and bottom of the bracket and then trimmed off the corners and used a Belt sander to clean up the cuts. The edge of the sander works great on the radius and rounding the edges. If you use a piece of poster board as a template it works wonders to fine tune prior to actually cutting. All of the parts I found at Lowe's except for the stainless bolts; Fastenal has these. I still need to get a new buffing wheel so I can polish these to a chrome finish. If you get the annealed aluminum, they have a coating on the surface that has a satin finish. You just need to be extra careful not to scratch the coating. Painters tape works best.
As you can see the deflectors are the same width as the windshield and they do an excellent job.
U.S. Army Medical Corp SFC (Ret)
2013 Road Star Silverado