Rhode Island
(Rhode Island General Laws Title 31)
Summary:
Lifts limited to 4 inches.
Frame & Body (§31-23-13.1):
"No person shall alter the height of or operate a motor vehicle with an altered height that has an original manufacturer's gross vehicle weight rating of up to and including 10,000 pounds, by elevating or lowering the chassis or body by more than 4 inches from the original manufacturers' specified height by use of so called 'shackle lift kits' for leaf springs or by use of lift kits for coil springs, tires, or any other means or device. The administrator of the division of motor vehicles shall establish rules and regulations for motor vehicle heights including exceptions for vehicles used for farming or forestry. No motor vehicle that has been so altered, modified, or changed beyond the provisions of this section or the rules and regulations established by the administrator of the division of motor vehicles, shall be operated on any highway."
Source
State of Rhode Island General Assembly
www.rilin.state.ri.us/Statutes/TITLE31/index.htm
Connecticut
(Connecticut Statutes Chapter 246, Title 14; Connecticut DMV Regulations)
Summary:
4-inch lift limit, no softer- or lighter-than-OE springs, no aftermarket shocks that reach their extended stroke limit.
Headlamps (§14-96b):
Mounted height not more than 54 inches nor less than 22 inches.
Tailamps (§14-96c):
Mounted height of not more than 72 inches nor less than 15 inches.
Steering Linkage (§14-80b):
"No person shall install or attach to the ball joints or tie rod ends of a motor vehicle any type of bushing, spring, shim or device which results in concealing the degree of play or motion in the ball joints or tie rod ends."
In addition to limiting lift height to 4 inches, Connecticut makes it illegal to use light
Suspension/Chassis (§14-137-25):
"No suspension system component shall be replaced unless such replacement component meets or exceeds the quality and performance standards established by the vehicle manufacturer and the safe operating characteristics of the vehicle on which such replacement component is installed are not adversely affected by such installation."
Height Limitations:
"No additional devices shall be installed or equipment substitutions made at any location on any motor vehicle when such installation or addition ... raises the sprung portion of the vehicle in excess of 4 inches above the vehicle's unladen height as established by the vehicle manufacturer ..."
Spring Replacement:
"No suspension springs which have a load carrying capacity or spring rate below that specified by the vehicle manufacturer shall be installed on any vehicle."
Shock Absorber Limitation:
"No shock absorber shall be installed in any manner which will allow it to reach its extreme stroke limitation while the vehicle is being operated."
Wheel Track:
"No modification of a vehicle suspension system geometry shall result in any reduction of such vehicle's wheel track distance."
Sources
FAQ on Vehicle Customization
www.ct.gov/dmv/cwp/view.asp?a=801&Q=252796
Motor Vehicles Chapter
www.cga.ct.gov/2009/pub/chap246.htm