I got the Slee 2” tow hitch receiver mounted up on the OEM bumper. The 2 top bolts included are M12-1.25 and utilize the threaded portion inside the bumper with a fixed nut inside. The bottom 2 bolts included are 1/2-20 and come with washers and lock washers. The bolts were a bit too short so I went to Lowe’s and got longer bolts (3” vs 2”) and the new bolts worked great. The receiver hangs down a little lower due to the rear bumper step lip. Very study for the intended use which is the trailer hitch bike rack.