Review on ISTUNT Motorcycle Full Exhaust System Suitable for Honda Grom Msx125 2013-2020 - No Baffle Muffler (Black Tips Dual Outlet) by Wyteboi Nallamothu

I'll say right away, for this money you can't go wrong. My Grom is a 2015. To install this exhaust you need to adjust the rear bracket. There are no instructions with the muffler and there is very little information anywhere on how to fit the back of the muffler. The 2 12mm nuts securing the upper tube to the head should be alternately tightened until the upper tube is seated on the head. For a rear mount, locate the cavity on the back of the rear kit and drill a pilot hole followed by several large drill bits until the included screw is included. The attachment point worked perfectly.