These look to be built well, but not to a high tolerance. During construction there is a part that needs to be bent and apparently that doesn’t alway happen right. I had to put some spacers on the left side and had to have the right side replaced, because it didn’t fit at all. Sierra would not help me with the replacement and directed me to Ilium Works. Ilium was very easy to work with. With how they are connected to the bike I am not sure how effective they will be.