Vehicle Mod Laws 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.

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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.

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Smoked or tinted film on headlights and taillights is illegal in Louisiana. Headlights must emit white light and taillights must show red at the required visibility distance, and tint that dims or discolors them violates those requirements.

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License plate frames are legal in Louisiana as long as nothing required stays hidden. The plate must be clearly visible and legible; covering it with material that obscures readability is unlawful.

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Louisiana sets no statewide lift, frame-height, or bumper-height limit. The only cap is overall vehicle height of 13 feet 6 inches (14 feet for interstate-only operation), and general equipment rules — headlamp height, working lighting — still apply.

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Louisiana permits two fog lamps, two auxiliary driving lamps, and two auxiliary passing lamps with no cover requirement. Spotlights are restricted to emergency, public-service, and qualifying farm vehicles.

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Louisiana requires at least 4 inches of ground clearance measured from the frame, plus at least 3 inches of suspension travel and working shocks and springs.

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Underglow is legal in Louisiana, including while driving, subject to color and flashing limits: No red or green visible from the front, no blue on non-emergency vehicles, and no flashing.

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Louisiana requires fenders, covers, or devices at least as wide as the tires — and the statute expressly names fender flares as an acceptable option.

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Transparent material is allowed on the topmost portion, extending no more than 5 inches down, and it may not be red or amber. Because the material must be transparent, a printed or opaque banner is not legal in Louisiana — only a clear tint band.

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Front side windows: minimum 25% VLT. Rear side windows: minimum 25% VLT. Back window: minimum 12% VLT. Darker limits apply behind the driver on some larger vehicles.

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