Bilstein 25-294095 Suspension Shock Absorber - Rear

Bilstein B8 8100 Shock Absorber Overview

The Bilstein B8 8100 shock absorber (part number 25-294095) is engineered for Lexus and Toyota light trucks, including the 4Runner, GX460, and GX470 models. Designed to enhance suspension performance, this monotube shock absorber offers reliable damping without adjustability, providing consistent handling and ride quality.

• Non-adjustable damping for consistent performance
• 60mm internal piston diameter with monotube design
• 60mm ID smooth body (non-coilover) construction
• Includes a reservoir for improved heat dissipation
• Eye lower mount (19.2mm) and stem upper mount
• Collapsed length: 14.94 inches (379.5 mm)
• Extended length: 23.48 inches (596.5 mm)
• Evo grey finish for corrosion resistance
• Compatible with Lexus 4Runner, GX460, GX470

Detailed Product Description

The Bilstein B8 8100 series shock absorbers are designed specifically for light trucks and SUVs, offering a monotube internal design that improves heat dissipation and maintains consistent damping performance under demanding conditions. The 60mm piston diameter and smooth body design ensure precise control and durability. This shock absorber features a reservoir that helps reduce fade during extended use, making it suitable for both on-road and moderate off-road driving. The eye lower mount and stem upper mount provide secure attachment points compatible with the suspension systems of Lexus 4Runner, GX460, and GX470 models. Finished in Evo grey, this shock absorber resists corrosion and maintains its structural integrity over time.

About the B8 8100 Product Line

The Bilstein B8 8100 series is tailored for light trucks and SUVs, focusing on enhanced handling and ride comfort without adjustable damping. This line uses monotube technology with a reservoir to improve shock response and heat management. The B8 8100 shocks are designed to replace factory units with improved performance characteristics while maintaining OEM fitment and durability.

Common Applications and Problem Solving

• Restores suspension control for Lexus 4Runner, GX460, and GX470 models
• Reduces excessive body roll and sway during cornering
• Improves ride comfort over rough or uneven terrain
• Addresses shock fade caused by heat buildup during extended driving
• Replaces worn or leaking factory shocks to maintain vehicle stability

Installation Notes and Tips

Installation of the Bilstein B8 8100 shock absorber (25-294095) requires standard suspension tools and mechanical knowledge. Ensure the vehicle is securely lifted and supported before removing old shocks. Verify the collapsed and extended lengths match the original equipment to maintain proper suspension geometry. No spring seat or boot is included, so retain or replace these components as needed. Check mounting points for wear or damage and replace hardware if necessary.

Quality Assurance and Warranty

Bilstein shock absorbers are manufactured to meet strict quality standards, using durable materials and advanced engineering. The B8 8100 series undergoes rigorous testing to ensure consistent performance and longevity. Warranty coverage details should be confirmed with the manufacturer or authorized distributor.