Vehicle Mod Laws in Kansas

Replacing the exhaust system is legal in Kansas, but a muffler in good working order is required and cutouts or bypasses are prohibited.

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Kansas 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 Kansas. 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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Kansas bans plate covers outright — clear ones included — whenever they affect the plate's visibility or reflectivity, and since July 1, 2026 a frame that hides the number, state name, or decal is a violation too (warnings only through the end of 2026).

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Kansas sets no statewide lift, frame-height, or bumper-height limit. The only cap is overall vehicle height of the general overall-height cap, and general equipment rules — headlamp height, working lighting — still apply.

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Kansas permits two each of spot, fog, auxiliary passing, and auxiliary driving lamps, with no cover requirement, subject to mounting heights and a four-lamp cap on front lamps over 300 candlepower.

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Kansas has no suspension, frame-height, or bumper-height statute.

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Underglow is legal in Kansas, including while driving, subject to color and flashing limits: Front-visible light must be white or amber with no red from the front, rear red, no flashing, and beams over 300 candlepower aimed within 75 feet.

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Kansas has no fender-coverage, mud-flap, or wheel-protrusion statute for ordinary vehicles.

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Sunscreening is allowed along the top of the windshield only and may not extend below the AS-1 line; it must be non-reflective and may not be red, yellow, or amber. Because the material must be transparent, a printed or opaque banner is not legal in Kansas — only a clear tint band.

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Front side windows: minimum 35% VLT. Rear side and back windows: minimum 35% VLT.

Limits, exceptions & statute →