Bilstein 25-325805 Suspension Shock Absorber - Rear Right

Bilstein B8 8100 Rear Shock for Tundra

The Bilstein B8 8100 reservoir shock absorber is built for lifted trucks and SUVs that need consistent control on rough pavement and off-road terrain. This rear right shock for the Toyota Tundra uses a large-bore monotube design with a remote or piggyback reservoir layout for straightforward installation and improved heat management.

Key Features

• Part number 25-325805
• Fits 2007-2021 Toyota Tundra, rear right
• Large 2.65-inch OD shock body for increased oil capacity
• Monotube internal design for consistent damping response
• 60mm piston diameter for added comfort and control
• Non-adjustable damping with velocity-sensitive digressive valving
• Reservoir-equipped design for heat control over long distances
• EVO Grey finish
• Lower mount: Eye 12.4mm; upper mount: Stem

Product Details

The Bilstein B8 8100 line focuses on direct-fit suspension shock absorbers for lifted light trucks. On this Toyota Tundra rear right application, the 25-325805 combines aerospace-quality billet components with a smooth-body shock layout and a 18mm shaft diameter. The larger shock body and reservoir help manage heat buildup during sustained use, while the digressive valve tuning is calibrated for the specific application to balance ride comfort and control. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Excessive rear suspension bounce on rough roads
• Heat-related damping fade during extended driving
• Reduced control on lifted Toyota Tundra setups
• Harsh ride quality from worn rear shock absorbers
• Loss of stability when towing or carrying load over uneven surfaces

Installation Notes

Fits 2007-2021 Toyota Tundra, rear right. This application requires wheels with a maximum of 6 inches of backspacing. Verify suspension lift height, mounting style, and clearance before installation. The shock uses a stem upper mount and an eye-style lower mount, so confirm the vehicle’s rear right mounting points match the listed dimensions: 15.63 inches collapsed length and 25.12 inches extended length. Part number 25-325805 should be matched to the exact rear right position only.

Quality Assurance

Bilstein B8 8100 shocks are engineered with a monotube design, large piston architecture, and reservoir cooling capacity to support consistent performance in demanding truck use. The B8 8100 product line is built for lifted applications where heat control and damping consistency matter, and 25-325805 follows that construction approach for the Toyota Tundra rear right fitment.