The Progressive Load Spring Kit is a practical and efficient solution for enhancing the performance of your vehicle. This kit includes a polyurethane spring, along with bolts and locknuts for easy installation. It also contains bushings that fit OE parts such as Automann MHS58948KS / MHS58948KSUB and Hendrickson 60961-745 (Haulmaax). With its progressive load design, this kit ensures a smoother and more controlled ride, improving overall stability and handling. Upgrade your vehicle's suspension system with this reliable and high-quality spring kit.