Review on ISTUNT Motorcycle Full Exhaust System for Honda Grom MSX125 2013-2020, Baffle-Free Muffler (Black Blue Dual Layer Tip) by Rusty Smith

I'll start by saying that for this money you can't go wrong. My grom is 2015 so you need to adapt the rear bracket to this exhaust. 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.