Coilovers are a type of suspension system used in vehicles that combine a shock absorber and a coil spring into a single unit. They are designed to improve handling and ride quality by allowing for adjustable ride height and damping settings. This means drivers can customize their vehicle's suspension to suit different driving conditions or personal preferences. Coilovers are popular among car enthusiasts and are often used in motorsport and street racing. They provide better control during cornering and can enhance the overall performance of a vehicle. Many aftermarket options are available, allowing for a wide range of adjustments and improvements.