Complete Guide to Vehicle Modification Laws in Minnesota
Minnesota has a detailed set of rules governing how far you can push your vehicle's aesthetics and performance before you cross into illegal territory. Whether you're lowering your ride, adding a light bar, or tinting your windows, it pays to know the exact figures before you start wrenching. The information in this guide was verified against primary statute text (September 2026), so you can treat it as a reliable starting point for your build. Let's break down each modification category one by one.
Exhaust Noise
Status: Conditional
Minnesota prohibits violating the state pollution control agency's motor-vehicle noise rules. For passenger cars, that works out to approximately 75 dBA measured 50 feet from the center of the lane. Note that the standard is published as a distance-versus-level graph rather than a simple table, so actual compliance is measured against that curve. Loud exhaust setups that push beyond this threshold can put you in violation.
This falls under exhaust noise laws, governed by Minn. R. 7030.1060 and Minn. Stat. §§ 169.693, 169.69, along with Minn. R. 7030.1010–.1060.
Lift Kits
Status: Conditional
Lift kits are allowed in Minnesota, but bumper height is capped. Passenger automobiles and station wagons are limited to a maximum bumper height of 20 inches, while four-wheel-drive multipurpose vehicles, vans, and pickup trucks can go up to 25 inches. Lifting beyond these limits can put your bumper height out of compliance.
See the full lift kit laws for details, under Minn. Stat. § 169.73, subd. 4a.
Headlight & Taillight Tint
Status: Illegal
Smoked or tinted film on headlights and taillights is illegal in Minnesota. Headlights must emit white light, and taillights must show red at the required visibility distance. Tint that dims or discolors either violates these color and visibility requirements, so film on headlights or taillights is not permitted.
There's a narrow exception: headlight tint is allowed only if the headlights still meet minimum light output requirements and maintain their white or amber color — tinted headlights cannot drop light output below statutory minimums.
Review the headlight tint laws, covered under Minn. Stat. §§ 169.49, 169.50, 169.64.
Light Bars & LED Lighting
Status: Conditional
Minnesota's rules here hinge on mounting height. Auxiliary driving lamps mounted between 16 and 42 inches can be used on the road legally. Any lamp mounted outside that window — such as a roof-mounted light bar — must be completely covered with opaque material while driving on a public highway.
The statute also spells out specific limits per lamp type:
- Auxiliary driving lamps: maximum of 2, mounted 16–42 inches
- Auxiliary low-beam lamps: maximum of 2, mounted 24–42 inches
- Spot lamp: maximum of 1, aimed no more than 100 feet
- Fog lamps: maximum of 2, mounted 12–30 inches
Check the light bar laws for the complete breakdown, under Minn. Stat. § 169.56, subds. 1–5.
Aftermarket Exhaust
Status: Conditional
Swapping out your exhaust system is legal in Minnesota, but a muffler in good working order is required, and cutouts or bypasses are prohibited. Additionally, removing the catalytic converter is prohibited under federal law, regardless of state rules.
Find more at the aftermarket exhaust laws page, under Minn. Stat. §§ 169.69, 169.693.
Underglow
Status: Conditional
Underglow lighting cannot be used while driving on Minnesota public roads. The law bans flashing lights, restricts blue, and caps lamps at 300 candlepower aimed within 75 feet — meaning any colored underglow lit while the vehicle is in motion is illegal.
The exceptions are specific: underglow is only permitted when the vehicle is parked and not in motion. Red and blue are off-limits entirely since they're reserved for emergency vehicles, but non-flashing white, amber, or other non-emergency colors may be acceptable when the vehicle is stationary.
See the underglow laws for more, under Minn. Stat. § 169.64.
License Plate Frames
Status: Conditional
License plate frames are legal in Minnesota as long as they don't hide anything required by law. It's unlawful to cover the assigned letters and numbers or the state-of-origin name with any material — this includes clear materials that affect visibility or reflectivity. Frames are banned specifically if they cover the state name.
The exception: frames are allowed provided they don't obscure any letters, numbers, or registration tabs on the plate.
Full details are on the license plate frame laws page, under Minn. Stat. § 169.79 subd. 7.
Lowering
Status: Conditional
Minnesota limits how much you can lower a vehicle. Overall vehicle and bumper height must stay within 6 inches of the original manufactured height. On top of that, bumper height itself is capped at 20 inches for cars and 25 inches for four-wheel-drive MPVs, vans, and pickups.
See the lowering laws page, under Minn. Stat. § 169.73.
Wheel & Tire Protrusion
Status: Legal
Minnesota's wheel-flap requirement doesn't apply to passenger cars at all — it's aimed at trucks, truck-tractors, trailers, semitrailers, pole trailers, and rear-end dump trucks. For passenger vehicles, there's no protrusion limit under this statute.
More info is available at the wheel protrusion laws page, under Minn. Stat. § 169.733.
Window Banners
Status: Illegal
Minnesota does not allow aftermarket windshield strips or banners of any kind. Any material that reduces windshield light transmittance is prohibited outright — a printed windshield banner is not legal to display.
Check the window banner laws page for specifics, under Minn. Stat. § 169.71, subds. 4, 4a.
Window Tint
Status: Conditional
Minnesota sets a 50% VLT minimum across the board for passenger vehicles: front side windows require minimum 50% VLT, and both rear side windows and the back window also require minimum 50% VLT.
Vehicle type matters here. The statute exempts pickups, vans, and limousines by name, but it doesn't specifically mention SUVs — in practice, enforcement commonly treats SUVs like vans, but the sedan limits (50% VLT minimums across the board) are the safer assumption if you're unsure.
For trucks and vans specifically, front side windows still require minimum 50% VLT, but pickups and vans are exempt from tint limits on windows located behind the driver.
Full detail is at the window tint laws page, under Minn. Stat. § 169.71.
Every modification above links to its full law page with exact limits, statute citations, and exceptions — or browse every Minnesota mod law in one place, free.
This guide is for informational purposes only. Data is AI-extracted from public statutes and may contain errors. Always verify with local authorities.