I am a pretty good mechanic I always do my own maintenance and accessory installing. I purchase a set of Ztechnik engine protectors and attempted to install them and followed the directions carefully. They flat out won't fit, the hole in the top bracket is about 5 to 8 mm's off. I took them off and on quite a few times always the same results. Didn't even try the right side. I had the same set on my 2009 RT and they fit perfectly. I wonder if quality is slipping at that company. For the price you pay for them they should go on easily. Has anyone else had that problem with the Ztechnik engine protectors. They said the set for the 2105 GS is the same.