Eibach's LOAD-LEVELING System is designed to provide load-carrying capability, featuring threaded height adjustable spring perches to fine tune ride heights and maximize ground clearance.Eibach's LOAD-LEVELING System is designed to provide load-carrying capability, featuring threaded height adjustable spring perches to fine tune ride heights and maximize ground clearance. Adjustable Threaded Spring Seat, ERO Race Springs and Bump Stops allow fine tuning of Rear Load Capacity and Ride Height For vehicles with Zero Added Weight. Eibach ERO Off-Road Race Spring Compatible for Adaptability 6061-T6 Billet Aluminum Threaded Spring Seat Made in the U.S.A. Five-Year Warranty Note: Approximate range of lift with zero added weight. Adjuster has 38mm of adjustment Note: We do not guarantee fitment, height or warranties on unlisted applications.