I just purchased a 2018 G310R that has a Akrapovik exhaust system. I found out the hard way that the system has a major design flaw. I was parking and had dropped my leg down behind the right foot rest. The bike rolled a couple of inches forward until the exhaust pipe was against my Draggn-Jeans pant leg. I got branded right through the pants. In looking at pictures of the stock system BMW puts a second heat shield there where as Akrapovik does not. So rider be ware!