Bilstein 25-311990 Suspension Shock Absorber - Front

Bilstein B8 5160 Shock Absorber for Jeep Wrangler JK

The Bilstein B8 5160 suspension shock absorber (part number 25-311990) is engineered for Jeep Wrangler and Wrangler JK models requiring reliable damping performance. Designed with a monotube internal structure and a smooth body, this shock absorber offers consistent handling and durability for light truck applications.

Key Features of Bilstein 25-311990 Shock Absorber

• Non-adjustable damping for consistent ride quality
• Monotube internal design for improved heat dissipation
• Billet reservoir clamp included for secure reservoir mounting
• Smooth body design (non-coilover) with zinc-plated finish for corrosion resistance
• Collapsed length: 15.91 inches (404 mm); Extended length: 27.49 inches (698.2 mm)
• Stroke/travel length of 11.58 inches (294.1 mm) for effective suspension articulation
• 46mm piston diameter and 14mm shaft diameter for robust performance
• Lower mount type: Eye 12.1mm; Upper mount type: Stem
• Includes remote reservoir for enhanced fluid capacity and cooling

About the Bilstein B8 5160 Product Line

The B8 5160 series from Bilstein is designed specifically for light trucks and off-road vehicles like the Jeep Wrangler JK. This product line features monotube shocks with remote reservoirs to improve heat management and maintain consistent damping under demanding conditions. The B8 5160 shocks are built to provide enhanced suspension travel and durability without adjustable damping, focusing on reliable performance for off-road and heavy-duty use.

Detailed Product Description

The Bilstein 25-311990 shock absorber is tailored for Jeep Wrangler and Wrangler JK models, offering a monotube design that improves heat dissipation and shock response. Its smooth body construction is zinc plated to resist corrosion, extending service life in harsh environments. The included billet reservoir clamp secures the remote reservoir, which increases fluid capacity and helps maintain consistent damping during extended off-road use. With a piston diameter of 46mm and a shaft diameter of 14mm, this shock absorber delivers stable and controlled suspension movement. The eye lower mount and stem upper mount ensure proper fitment and ease of installation on compatible Jeep models.

Common Applications and Problem Solving

• Improves suspension control and stability on Jeep Wrangler JK during off-road driving
• Reduces shock fade caused by heat buildup in demanding terrain
• Addresses excessive suspension travel and bottoming out issues
• Enhances ride comfort by providing consistent damping performance
• Replaces worn or damaged factory shocks to restore vehicle handling

Installation Notes and Tips

Ensure compatibility with Jeep Wrangler and Wrangler JK models before installation. The shock absorber features an eye lower mount (12.1mm) and stem upper mount for direct fitment. The included billet reservoir clamp should be securely fastened to prevent movement of the remote reservoir during operation. No boot or spring seat is included, so verify if additional components are required for your specific suspension setup. Professional installation is recommended to ensure proper torque specifications and alignment.

Quality Assurance and Warranty

Bilstein shock absorbers are manufactured to meet strict quality standards with durable materials and precision engineering. The B8 5160 series is designed for long-lasting performance in light truck applications. Warranty details are provided by Bilstein and should be confirmed at the time of purchase to understand coverage specifics for part number 25-311990.