Ark. Code Ann. § 27-37-601: Noise or smoke-producing devices prohibited

(a) Every motor vehicle shall, at all times, be equipped with a factory-installed muffler or one duplicating factory specifications, in good working order and in constant operation, to prevent excessive or unusual noise and annoying smoke.

(b) No person shall use on a motor vehicle upon the public roads, highways, streets, or alleys of this state, nor shall any person sell for use on a motor vehicle upon the public roads, highways, streets, or alleys of this state, a muffler, other than as defined in subsection (a) of this section, cutout, bypass, similar device, or any type device which produces excessive or unusual noise or smoke.