Bilstein 25-329988 Suspension Shock Absorber - Rear

Bilstein B8 5160 Remote Reservoir Shock Absorber

The Bilstein B8 5160 remote reservoir shock absorber is a direct-fit suspension upgrade for lifted trucks and SUVs that need more control on rough terrain. Built with a monotube design and velocity-sensitive digressive valving, this shock is tuned for consistent damping, improved cooling, and added wheel travel.

Part number 25-329988 is part of the Bilstein B8 5160 line, a remote reservoir shock series developed for light truck applications where heat management and suspension movement matter. The remote reservoir layout helps maintain performance during repeated off-road use while keeping the installation low profile with the included billet reservoir clamp where applicable.

Key Features

• Bilstein B8 5160 series remote reservoir shock absorber
• Direct-fit design for lifted truck and SUV suspension setups
• Monotube internal design for consistent fade-resistant damping
• Velocity-sensitive digressive valving tuned by application
• Remote reservoir for increased cooling capacity and wheel travel
• Non-adjustable damping
• 46mm piston diameter with 14mm shaft
• Zinc-plated finish with black bellows boot included
• Eye 14.1mm upper and lower mounts
• Billet reservoir clamp included

Detailed Description

Bilstein 25-329988 is engineered for drivers who want more stable suspension control on lifted vehicles without changing to a coilover-style setup. The smooth-body shock uses a 46mm piston and monotube construction to help manage heat and maintain damping consistency over demanding terrain. The remote reservoir adds fluid capacity, which supports better cooling and sustained performance during extended off-road driving.

This shock absorber is a strong match for lifted truck and SUV builds that need improved articulation, reduced fade, and a clean installation. If you are searching for a Bilstein shock absorber for a lifted truck or SUV, or a Bilstein B8 5160 remote reservoir shock for off-road suspension tuning, part number 25-329988 is built for that application. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Excessive shock fade during repeated off-road use
• Reduced suspension control on lifted truck and SUV setups
• Heat buildup in demanding trail or washboard conditions
• Limited wheel travel from a standard shock absorber
• Loose or unsettled ride quality after suspension lift changes

Installation Notes and Tips

Verify upper and lower eye mount dimensions before installation, since this shock uses 14.1mm eye mounts at both ends. Confirm collapsed length, extended length, and stroke travel against the vehicle’s suspension geometry to ensure proper fitment and safe operation. Because this is a non-adjustable shock absorber, damping is set by the application-specific valving.

For buyers searching by vehicle keywords, this Bilstein shock absorber is a fitment-focused option for lifted truck and SUV suspension builds, including Bilstein B8 5160 applications on Toyota Tacoma and Toyota 4Runner platforms where the listed dimensions and mount style match the vehicle setup.

Quality Assurance

Bilstein designs the B8 5160 series with a monotube layout, zinc-plated finish, and application-specific digressive valving to support durable performance in harsh off-road environments. The included billet reservoir clamp helps provide a secure, low-profile reservoir installation where applicable.