Replaces the two M6 rear arm mounting bolts with a grade 10.9 through-bolt and lock nut
Heavy-duty through-bolt for competition hill climb and extreme riders
Comes stock on 2021 M models
Includes 2623-297 M6x110mm cap screw, 8437-604 M6 nylon flange nut, and instructions
Fits Models:
2019-2020 M 8000 Alpha One 154 & 165
OEM part number 0637-535