The H&R Electronic Lowering System - 289521 is a suspension upgrade kit designed to lower the ride height of a vehicle. It includes electronic adjustable springs and shocks, allowing for precise control over the vehicle's suspension. This system is ideal for those looking to improve the handling and appearance of their vehicle, as well as for those who want to achieve a more aggressive stance. The kit is designed to be easy to install and is compatible with a wide range of vehicle makes and models. It is a high-quality product that is designed to provide improved performance and a more comfortable ride.