Of course, Illinois has the trifecta of laws for lifted trucks. There is a suspension lift limit, a maximum frame height limit and a bumper height limit. However, suspension lift kits are allowed in Illinois as well as aftermarket wheels and tires, performance shocks, aftermarket bumpers, and grille guards. A lot of the ultimate rides in Illinois have passed through the CPW Truck Stuff shop for a lift kit or other modification.
CODE – The Illinois Compiled Statutes (ICS) define the street legal laws for the state of Illinois
DIMENSIONS – Vehicle dimensions in Illinois are limited to a width of 102 inches, a height of 13 feet 6 inches, and a single vehicle length of 42 feet
TIRES – Illinois 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 deeper than the original tread depth.
WHEELS – There are no specific laws regulating wheels in the Illinois statutes
BRAKES – Vehicles driven in Illinois are required to have brakes on all four 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.
STEERING – Illinois does not have any specific steering related laws
SUSPENSION – A vehicle’s suspension cannot be modified so that it causes the vehicle’s bumper to be raised or lowered more than 3 inches
FRAME – The maximum vehicle frame height in Illinois depends on the vehicle’s GVWR. The lowest portion of the vehicle’s body must not be more than 4 inches above the frame. (Under 4,500 – 24 inches max, 4,501 to 7,500 – 26 inches max, 7,501 to 10,000 – 28 inches max)
BUMPERS – Front and rear bumpers are required in Illinois. Bumper heights are limited according to the vehicle’s GVWR
LIGHTS – In addition to headlights and tail lights, vehicles in Illinois 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.
WINDOWS – All vehicles are required to have windshields and windshield wipers in Illinois
EXHAUST – Mufflers are required on all vehicles in Illinois. Exhaust cutouts and bypasses are prohibited.
ENGINE – It is unclear whether Illinois has any engine swap or engine performance modification rules.
EMISSIONS – Several counties in Illinois, including Cook County, currently require emissions testing.