Daystar was the first to enter the Leveling Kit market in 1995. Though there have been many companies that have entered the market since, Daystar's Leveling Kits offer many advantages that the others can not claim: No Metal-On-Metal Contact - Daystar uses Polyurethane material in its Leveling Kits for a reason: It's an insulator. It absorbs the Noise, Vibration, and Harmonics (NVH) that come from the suspension and avoids transmitting them to the passenger compartment. All competitors use steel or aluminum in their Leveling Kits. If you were to take apart any factory suspension, you are going to find rubber, polyurethane, and often both in a typical suspension. These pieces are there for a reason; they absorb the NVH. All of Daystar. In the unlikely event you experience a problem with a Daystar product, they will take care of it. Made in the U.S.A. All of the leveling kits are manufactured at the plant located in Phoenix, Arizona. In-house manufacturing ensures a level of quality control that no one else can match.and they have the ISO9001 certification to prove it. Top-Mount Easy-Install Design - Most late-model vehicles have gone to a strut type of front suspension. Most of Daystar's strut applications are a Top-Mount design, meaning that the components bolt to the top of the factory strut assembly. This type of leveling kit does not preload the factory coil spring, so factory ride quality is maintained, and installation requires only simple hand tools. Daystar Leveling Kits work within the factory suspension design, meaning that they work within the factory's design parameters to achieve an increase in ride height that levels the stance of the vehicle. As they work within the factory's design, there are not a bunch additional modifications involved.