It is a slip-on silencer that can be mounted on SR400/500 (FI Vehicle Possible) with bolt-on.
It involved sound finishing with the MOTOR ROCK flow design.
It has a reputation for the roaring of the bass when idling is crisp and the accelerator is opened.
This muffler is a good sound of bass. It is light and well packaged so there is no worry about breakage. I like the price because it is cheap and delivery is fast.