Exhaust Noise in Louisiana
Louisiana sets no statewide decibel limit for passenger cars. A muffler in good working order is required, exhaust may not produce excessive or unusual noise, and cutouts or bypasses are prohibited.
Verified against primary sources · August 2026
What the law says
Louisiana law is qualitative rather than numeric: A muffler in good working order is required, exhaust may not produce excessive or unusual noise, and cutouts or bypasses are prohibited. Louisiana has a separate exhaust-modification ban at R.S. 32:353.
Specific Limits
- Statewide decibel limit
- none
Frequently Asked Questions
Are exhaust noise legal in Louisiana?
What are the exact exhaust noise limits in Louisiana?
Street-legal exhaust noise picks
Gear that helps you mod without a ticket in Louisiana.
Measure your exhaust at the test RPM before a fix-it ticket does.
Shop on AmazonA removable insert that brings a loud exhaust back under your state's limit.
Shop on AmazonAs an Amazon Associate, Is My Mod Legal earns from qualifying purchases made through these links, at no extra cost to you. We only recommend gear that helps you stay street-legal.