Michigan Lift Laws and Vehicle Equipment Laws
Michigan has street legal laws that limit a vehicle's frame height and bumper height. Lift blocks are not allowed on front springs, and rear lift blocks are limited to 4 inches. While keeping within these restrictions, Michigan drivers are allowed to install suspension lift kits, aftermarket wheels and tires, performance shocks, aftermarket bumpers, and grille guards.
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Code |
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The Michigan Compiled Laws (MCL) define the street legal laws for the state. |
MCL Ch. 257
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Dimensions |
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Vehicle dimensions in Michigan are limited to an overall width of 102 inches, a height of 13 feet 6 inches, and a single vehicle length of 45 feet. The width of a vehicle's body is limited to 96 inches. |
MCL 257-717
MCL 257-719
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Tires |
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Michigan requires that all tires be in safe condition. Tires must not have any exposed cords or bulges. There is a minimum tire tread depth of 1/16 inch. Tires are allowed to be grooved, just not any deeper than the original tread depth. |
MCL 257-710
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Wheels |
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There are no laws specifically related to wheels found in Michigan's laws. |
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Brakes |
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Vehicles driven in Michigan are required to have brakes on all 4 wheels. The brakes must be capable of stopping the vehicle from a speed of 20 mph within 30 feet. A secondary, mechanical, parking brake is also required. |
MCL 257-705
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Steering |
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Michigan requires that a vehicle's steering system retains the factory geometry. It is unlawful to weld on pitman arms, drag links, or tie rods. |
MCL 257-710C
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Suspension |
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In Michigan, front lift blocks are prohibited. Rear lift blocks must be one piece and cannot be more than 4 inches tall. Spring shackles cannot be more than 2 inches longer than stock.
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MCL 257-710C
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Frame |
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The maximum vehicle frame height in Michigan depends on the vehicle's GVWR.
Vehicle GVWR |
Max. Frame Height |
Under 4,501 |
Front: 24 inches | Rear: 26 inches |
4,501 to 7,500 |
Front: 24 inches | Rear: 28 inches |
7,501 to 10,000 |
Front: 26 inches | Rear: 30 inches |
( Measured to the bottom of the frame. )
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MCL 257-710C
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Bumpers |
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Vehicle bumper height in Michigan is limited according to the vehicle's GVWR.
Vehicle GVWR |
Max. Bumper Height |
Under 4,501 |
Front: 24 inches | Rear: 26 inches |
4,501 to 7,500 |
Front: 24 inches | Rear: 28 inches |
7,501 to 10,000 |
Front: 26 inches | Rear: 30 inches |
( Measured to the bottom of the bumper. )
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MCL 257-710C
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Fenders |
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It unknown if fenders or mud flaps are required in Michigan. |
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Lights |
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In addition to headlights and tail lights, vehicles in Michigan are allowed to have auxiliary lights.
When a vehicle is equipped with extra lighting, no more than 4 front lights can be on at one time while driving.
Light |
Number |
Min. Height |
Max. Height |
Headlights |
2 min. |
24 inches |
54 inches |
Tail lights |
1 min. |
n/a |
n/a |
Spot lights |
2 max. |
n/a |
n/a |
Fog lights |
2 max. |
12 inches |
30 inches |
( Measured to the center of the light. )
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MCL 257-685
MCL 257-686
MCL 257-969
MCL 257-685
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Windows |
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All vehicles are required to have windshields and windshield wipers in Michigan. |
MCL 257-708A
MCL 257-709
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Exhaust |
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Mufflers are required on all vehicles in Michigan. Exhaust cutouts and bypasses are prohibited. |
MCL 257-707
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Engine |
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It is unclear whether or not Michigan has any engine swap or engine performance modification rules. |
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Emissions |
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Michigan does not require emissions testing. |
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Massachusetts Street Legal Laws 
