I own a 2017 softail slim. I bought a sundowner seat from Harley so my wife could ride with me. This is the only style sissy bar brackets I found that work with the sundowner seat that does not require the license plate relocation kit or tail light relocation kit from Harley to install this. If you go with a solid frame sissy bar that requires install between fender and strut the sundowner seat won't fit because of how much surface area the seat covers on the fender. This product is great and easy to install. The only issue I had when installing the longer bolts in the frame is the instruction said to complete the job you need a 5/16" allen head to install the frame bolts but you actually need a 7/32".