Bilstein B8 5100 Rear Shock for 3–4 in Lift for 1st-Gen 4Runner (1984–1989)

The Bilstein B8 5100 Rear Shock is engineered to improve rear suspension performance on lifted 1st-Gen 4Runner platforms. Designed to handle increased ride height and suspension travel, it delivers consistent damping and enhanced control across a variety of driving conditions.

A monotube gas-pressure architecture maintains stable internal pressure and promotes efficient heat dissipation. This design helps ensure consistent performance during extended use, especially in demanding off-road environments.

The 46-millimeter digressive piston adjusts damping force based on road input, providing firm control over large impacts while maintaining comfort over smaller surface irregularities. This results in improved rear-end stability and reduced bounce.

Each shock is specifically tuned for lifted applications, ensuring compatibility with increased suspension travel and modified spring rates. This calibration maintains balanced handling characteristics and predictable ride behavior.

Built for durability, the monotube design minimizes oil aeration and prevents performance fade under repeated stress. Its robust construction supports long-term reliability in both daily driving and aggressive off-road use.