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

The Guide to Legal Car Modifications in Michigan

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

If you live in Michigan or are planning on moving to the area, you need to know about the vehicle modification laws in the state. Following these modification regulations will help ensure that your vehicle is street legal when driving throughout the state.

Sounds and noise

Michigan has regulations concerning the sound system and the muffler on your vehicle.

Sound system

  • 90 decibels when traveling 35 MPH or more, 86 decibels at 35 MPH or less.
  • 88 decibels when stationary.

Mufflers

  • Mufflers are required on all vehicles and must work properly with no holes or leaks.

  • Muffler cutouts, amplifiers, bypasses or other modifications that are designed to amplify the sound are not permitted.

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

Frame and suspension

Michigan has the following regulations on frame and suspension height:

  • Vehicles cannot be taller than 13 feet 6 inches.

  • Vehicles cannot have tie rods, drag links or pitman arms welded to the vehicle to affect steering.

  • Front lift blocks are not permitted.

  • One-piece rear lift blocks with a height of four inches or less are permitted.

  • Spring shackles longer than two inches beyond stock length are not permitted.

  • Vehicles with GVWR less than 7,500 have a maximum frame height of 24 inches.

  • Vehicles with a GVWR of 7,501-10,000 have a maximum frame height of 26 inches.

  • Vehicles with a GVWR of less than 4,501 have a maximum bumper height of 26 inches.

  • Vehicles with a GVWR of 4,-7,500 have a maximum bumper height of 28 inches.

  • Vehicles with a GVWR of 7,501-10,000 have a maximum bumper height of 30 inches.

Engine

Michigan does not have engine modification or swap regulations and does not require emissions testing.

Lighting and windows

Lights

  • No more than 4 lights of 300 candlepower can be lighted at one time of the highway.

  • Markers lamps, reflectors and clearance lamps on the front of the vehicle must be amber.

  • All rear lighting and reflectors must be red in color.

  • License plate light must be white.

  • Two side fender or cowls lamps in white or amber light are permitted.

  • One running board light per side in amber or white are permitted.

  • Flashing or oscillating lights (other than amber hazard lights) are not permitted on passenger vehicles.

Window tinting

  • Non-reflective tint can be applied to the top four inches of the windshield.

  • Front side, back side and rear windows can have any tint darkness.

  • Side mirrors are required if back window is tinted.

  • Front side and back side window reflective tint cannot reflect more than 35%.

Antique/classic car modifications

Michigan requires those with historic vehicles to fill out an Application and Certification for Michigan Historic Plates. Additionally, these vehicles are not allowed to be used for normal, daily transportation.

If you want to make sure your modifications are within Michigan laws, 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

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....


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: Is it legal to have blue lights in license plate?

This is something that may vary from state to state depending on where you live. You will need to check with the local department of transportation or highway patrol in your city or state's jurisdiction. Some states have vehicle inspection...

Q: Will a after market performance chip increase my horse power? Will it pass smog?

If you live in California or any jurisdiction that regulates these aftermarket products, the first thing to check is whether the California Air Resources Board (CARB) has "registered" or "approved" the product. If no approval exists, particularly in California, that...