Slip-on systems are an inexpensive and simple solution to enhance the sound and looks of 125s. Only the rear muffler needs to be replaced with this system. Manifold and catalytic converter of the original exhaust system are preserved. Especially the rear silencer of the 125 SX is unfortunately not very attractive. Not to mention the bad almost inaudible engine sound. The Arrow Thunder offers remedy. In the version offered here, the jacket of the rear silencer is made of brushed aluminium with a stainless steel end cap. Of course the rear silencer is equipped with an EG-BE. So the EU-wide legal use of the rear silencer is no problem.