The Bilstein B8 8100 ZoneControl Rear Shock Absorber delivers progressive highway composure and tunable off-road traction for lifted 2017–2026 Ford F-250 and F-350 Super Duty trucks.

• ZoneControl rebound adjustment ring enables tool-free dial changes between firm pavement stabilization and compliant dirt-wheel travel, keeping wheel tracking predictable during heavy hauling and winding canyon runs.
• Genuine monotube assembly packed with high-pressure nitrogen gas and precision-calibrated silicone-treated damping oil prevents fluid foaming and hydraulic compressibility, eliminating the temperature-induced fade that degrades stock units during repeated towing or backcountry descents.
• Zinc-flaked corrosion-resistant steel cylinder paired with a hardened chromium-plated needle shaft and dual-lip rubber wiper seal blocks abrasive silica, road salt, and brake dust from entering the damping chamber for sustained fade-free service life.
• Precise OEM mounting interface aligns directly with chassis pickup points, maintaining the corrected control-arm angles and spring rates achieved by aftermarket coilovers or leveling blocks without demanding auxiliary tie-down bars or geometry spacers.
• Handles factory max payload ratings and heavier aftermarket gear capacity while keeping rear-end squat controlled; ships in a 32 × 14 × 6 inch carton weighing 19.15 pounds ready for straightforward bench-or-bedside installation.
• Backed by a limited lifetime warranty covering material and machining defects, securing your rebuilt Super Duty suspension investment for the duration of ownership.