Do my pro circuits have flame arrestors?

[Skithis]

What the title said?

[extreem9]

What the title said?

Usually if they have a spark arrestor factory it will say U.S. forestry approved, it is stamped into the muffler. If someone put one on it then look inside of it with a flashlight to see if you see what apears to a screen kind of looks like the same matirial as the screen door of your house, most of the time you can feel it with your finger.