If you are serious about strength, look no further! We build these bad boys out of 3/16" thick steel plate, CNC cut and formed, and then fully welded. Slide over rocks without worry! With our Lower trailing arms not only are they beefed up and strong, but we also went ahead and addressed some issues that Arctic Cat neglected. We decided to get rid of the factory single shear coil over mount. Our trailing arms are fully boxed and gusseted. The coil over mount is fully plated to not only add strength but also to give you a built in armor plate to protect the coil over and its mounting bolt. All new grade 8 zinc coated bolts, washers and nuts are included. They bolt in to your machine without any modifications needed.