The H&R Sport Lowering Spring Set - 28999-6 is a performance suspension upgrade for vehicles. It is designed to lower the ride height of the vehicle, resulting in improved handling and a more aggressive appearance. The set includes four springs, two for the front and two for the rear, which are made from high-quality spring steel and have a progressive spring rate for optimal performance. These springs are designed to work with the vehicle's existing shock absorbers, providing a sportier and more responsive ride without sacrificing comfort. The H&R Sport Lowering Spring Set is a popular choice for enthusiasts looking to improve the handling and appearance of their vehicle.