La. Stat. tit. 32 § 353
Current with changes from the 2024 legislative session, Chs. 3, 6-496, effective on or before 7/1/2024
No person shall modify the exhaust system of a motor vehicle in a manner which will amplify or increase the noise emitted by the motor of such vehicle, above that emitted by the muffler originally installed on the vehicle and the original muffler shall comply with all of the requirements of R.S. 32:352.
La. R.S. § 32:353