A Suspension modification, often done by Jeep, truck, SUV and offroad enthusiasts is performed to raise the ride height of their vehicle. Suspension lifts (also referred to as lift kits or leveling kits) enable steeper approach, departure, and breakover angles, higher ground clearance, and helps accommodate larger wheels and tires. Due to the raised center of gravity, maximum safe operating angles are reduced and roadholding is often significantly impaired with a lift kit.

Kits can be as simple as lift blocks (spacers placed between the axles and leaf springs) and coil spring/strut spacers and extended shocks; to replacement control arms, trailing arms, and custom four-link systems. Suspension lifts also impact other factors, such as drive shaft length, steering geometry and brake lines. Legality is often an issue when installing suspension lifts, as many jurisdictions have varying laws on vehicle ride height and placement of lights and bumpers.