The law in Tennessee is pretty much the same (despite the alleged laxity in enforcement):
55-9-202. Mufflers - Muffler cutouts prohibited - Penalty.
(a) No person shall drive a motor vehicle on any road, street or highway unless such motor vehicle is equipped with a muffler in good working order and in constant operation to prevent excessive or unusual noise and annoying smoke.
(b) It is unlawful to use a "muffler cutout" on any motor vehicle upon any road, street or highway.
(c) A violation of this section is a Class C misdemeanor.