Bilstein 25-312003 Suspension Shock Absorber - Rear

Bilstein B8 5160 Shock Absorber for Jeep Wrangler JK

The Bilstein B8 5160 suspension shock absorber (part number 25-312003) is engineered for Jeep Wrangler and Wrangler JK models requiring reliable monotube shocks with external reservoirs. Designed to enhance off-road and on-road handling, this shock absorber offers consistent damping performance without adjustability.

Key Features of Bilstein 25-312003 Shock Absorber

• Non-adjustable damping for consistent ride quality
• Monotube internal design for improved heat dissipation
• Includes billet reservoir clamp for secure mounting
• Smooth body design (non-coilover) with zinc plated finish
• Collapsed length: 16.12 inches (409.5 mm), extended length: 27.45 inches (697.2 mm)
• Stroke/travel length of 11.33 inches (287.8 mm)
• Lower mount type: 12.1mm eye; upper mount type: bar pin
• 46mm piston diameter and 14mm shaft diameter for durability
• External reservoir included for improved fluid capacity and cooling

About the Bilstein B8 5160 Product Line

The B8 5160 series from Bilstein is designed specifically for light trucks and SUVs, including Jeep Wrangler models. This product line features monotube shocks with remote reservoirs to provide enhanced damping control and heat management during demanding driving conditions. The 25-312003 shock absorber is part of this series, offering a smooth body design that is compatible with vehicles requiring non-coilover suspension setups.

Detailed Product Description

This Bilstein shock absorber is built with a monotube internal design that allows for efficient heat dissipation, reducing fade during extended use. The external reservoir increases fluid volume, which helps maintain consistent damping performance under heavy loads or rough terrain. The zinc plated finish provides corrosion resistance, while the included billet reservoir clamp ensures secure installation of the reservoir. With a piston diameter of 46mm and a shaft diameter of 14mm, this shock absorber is engineered for durability and reliable performance on Jeep Wrangler and Wrangler JK vehicles.

Common Applications and Problem Solving

• Improves handling and stability on off-road trails and uneven terrain
• Reduces shock fade during extended or aggressive driving
• Addresses worn or leaking factory shocks causing poor ride quality
• Enhances suspension travel and articulation for lifted Jeep Wranglers
• Maintains consistent damping without the need for manual adjustment

Installation Notes and Tips

Compatible with Jeep Wrangler and Wrangler JK models, this shock absorber requires mounting to the factory lower eye (12.1mm) and upper bar pin mounts. The included billet reservoir clamp should be used to secure the external reservoir properly. Since this is a non-adjustable shock, no damping tuning is necessary. Ensure all mounting points are clean and free of debris before installation to maintain proper fitment and function.

Quality Assurance and Warranty

Bilstein shock absorbers are manufactured to meet strict quality standards for durability and performance. The B8 5160 series, including part number 25-312003, undergoes rigorous testing to ensure consistent damping characteristics and long service life. Warranty information is provided by Bilstein and should be verified with the manufacturer or authorized distributor.