Arkansas Code
Chapter 21 - All-Terrain Vehicles
§ 27-21-108. Equipment

(a) Every all-terrain vehicle operated in this state shall be equipped with an adequate muffler system in good working condition. Every all-terrain vehicle operated in this state shall be equipped with a United States Forest Service-qualified spark arrester.
(b) No person shall:
(1) Equip the exhaust system of an all-terrain vehicle with a cutout, bypass, or similar device;
(2) Operate an all-terrain vehicle with an exhaust system equipped with a cutout, bypass, or similar device; or
(3) Operate an all-terrain vehicle with the spark arrester removed or modified except for use in closed-course competition events.