The Bilstein B6 4600 rear shock absorber for 2017–2018 Ford F-250 and F-350 Super Duty is a direct-fit monotube unit tuned for those applications. Its 46mm monotube construction and velocity-sensitive digressive piston deliver consistent, fade-free damping and aimed improvements in ride, handling and comfort. Designed to work with OEM springs and hardware for a simple replacement.
Bilstein 4600 Series 17-18 Ford F-250 Super Duty / F-350 Super Duty Rear Shock Absorber