Aftermarket Exhaust in Louisiana
Replacing the exhaust system is legal in Louisiana, but a muffler in good working order is required and cutouts or bypasses are prohibited.
Verified against primary sources · August 2026
What the law says
Replacing the exhaust system is legal in Louisiana, but a muffler in good working order is required and cutouts or bypasses are prohibited. Removing the catalytic converter is prohibited by federal law (Clean Air Act § 203) regardless of state rules. Excessive fumes and smoke are separately prohibited. Louisiana's annual safety inspection includes the exhaust.
Specific Limits
- Cutouts
- prohibited
- Muffler required
- Yes
- Catalytic converter
- removal prohibited by federal law
Frequently Asked Questions
Are aftermarket exhaust legal in Louisiana?
What are the exact aftermarket exhaust limits in Louisiana?
Street-legal aftermarket exhaust picks
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