Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. The Guide to Legal Car Modifications in Utah

The Guide to Legal Car Modifications in Utah

The Guide to Legal Car Modifications in Utah ARENA Creative / Shutterstock.com

Whether you live in or plan to move to Utah and you have a modified vehicle, you need to make sure that it conforms to the laws throughout the state. The following information will help you keep your car or truck street legal when driving in Utah.

Sounds and noise

Utah has a variety of regulations concerning the sounds your vehicle makes.

Sound systems

  • While there are no specified statewide noise ordinances in Utah, each county has its own laws that you will have to follow. Make sure to check with your local government offices to ensure you aren’t violating any laws with your sound system.

Mufflers

  • Mufflers are required on all vehicles and must prevent unusual or excessive noise.

  • Mufflers with bypasses, cutouts, and other devices that alter the sound of the engine are not permitted.

Tip: Always check with local county laws in Utah to make sure you are following any municipal noise ordinances that may be more stringent than state-level laws.

Frame and suspension

While Utah does not limit suspension and bumper heights, frame height is regulated based on the Gross Vehicle Weight Rating (GVWR).

  • Less than 4,500 GVWR – 23 inch maximum frame height

  • 4,500-7,499 GVWR – 26 inch maximum frame height

  • 7,500 and up GVWR – 28 inch maximum frame height

  • The lowest part of the floor of the vehicle cannot extend over three inches above the topmost part of the frame.

  • Vehicles can be no taller than 14 feet

Engine

Utah does not list any engine swap or modification regulations. However, those living in Salt Lake, Weber, and Davis counties are required to pass emissions testing.

Lighting and windows

Lights

  • Rotating lights are only permitted on emergency vehicles and school buses.

  • Rotating or flashing blue lights are only permitted on police vehicles.

  • Two spotlights are permitted.

Window tinting

  • Non-reflective tint is permitted on the windshield above the AS-1 line from the manufacturer.

  • Front side windows must allow over 43% of light to pass through.

  • Rear window and back side window tint can be any darkness.

  • Side mirrors are required with rear window tint.

  • Reflective tint is not permitted.

Antique/classic car modifications

Utah has no requirements for classic cars. However, original issue antique plates can be used providing they do not use numbers already in rotation on another plate.

If you want to make sure your vehicle complies with the modification laws in Utah, YourMechanic can provide the mobile mechanics to help you install the new parts. You can also ask our mechanics what modifications may be best suited to your car using our free online Q&A system, Ask a Mechanic.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...

Related questions

Q: I want to put an exhaust system on my car but it is not street legal, what can I do?

When it comes to this type of exhaust system, there is no workaround that will make it legal. If these exhaust components do not have the air quality resource tag on them, then they cannot legally be used on the...

Q: I want to know what engines would fit my motor mounts properly

Hello. The biggest engine that this vehicle originally came equipped with was the 5.7L V-8. This is the 350 cubic inch version. I am not sure what modifications to your vehicle that would need to be done to make this...

Q: Power capabilities

Hi there. The engine will not start to break down or lose power at that point. The factory engine does not make that much power on its own so I have to assume you are talking about aftermarket power modifications....