Bilstein 25-294118 B8 8100 Rear Left Shock 2007-2021 Toyota Tundra 4WD/2WD 60mm

Vehicle Fitment

• 2007-2021 Toyota Tundra (4WD, All Trims: SR, SR5, Limited, TRD Pro, TRD Off-Road, Platinum, 1794 Edition, 4.0L V6 / 4.6L V8 / 5.7L V8, 0-1.5" Rear Lift)
• 2007-2021 Toyota Tundra (2WD/RWD, All Trims, 4.0L V6 / 4.6L V8 / 5.7L V8, 0-1.5" Rear Lift)

Fitment Notes

• Position: Rear Left (Driver Side) - sold individually. A matching rear right shock is required for a complete rear axle installation.
• Fits vehicles at factory ride height or with up to 1.5" of rear lift.
• Fits both 4WD and 2WD (RWD) Tundra configurations across all applicable model years.
• Covers all body styles: Regular Cab, Double Cab, and CrewMax.
• This is the standard B8 8100 monotube reservoir shock - non-adjustable, smooth body design. It is distinct from the B8 8100 (Bypass), which uses an externally adjustable dual-tube bypass design.
• Reservoir mount brackets are included for an easy, no-fabrication installation.

Features

• Bilstein B8 8100 series - large-bore 60mm monotube reservoir shock purpose-built for lifted trucks and SUVs, delivering improved off-road capability and sustained performance on long-distance rough terrain runs.
• Monotube gas-pressure design completely separates nitrogen gas from hydraulic fluid, eliminating foaming and ensuring consistent, fade-free damping performance regardless of terrain intensity or duration.
• Velocity-sensitive digressive valve settings tuned specifically for the Toyota Tundra application, balancing comfort during highway driving with responsive control over rough road inputs.
• Remote or piggyback reservoir significantly increases oil volume capacity for superior heat dissipation compared to a standard monotube shock - critical for sustained high-intensity off-road use.
• 60mm large-bore hard-anodized aluminum piston offers a greater range of damping control and exceptional long-term durability under demanding off-road and towing conditions.
• 18mm piston rod provides maximum tensile strength and reduces internal gas force ramp-up for a smoother, more predictable ride feel.
• Direct-fit bolt-on installation using OEM mounting locations - no fabrication, modification, or custom hardware required.
• Backed by Bilstein's Lifetime Limited Warranty for the original purchaser.

Specifications

• Series: B8 8100
• Position: Rear Left (Driver Side)
• Rear Lift Compatibility: 0-1.5"
• Drivetrains: 4WD and 2WD (RWD)
• Internal Design: Monotube
• Body Design: Smooth Body (Non-Coilover, Non-Bypass)
• Piston Diameter: 60mm
• Piston Rod Diameter: 18mm
• Collapsed Length: 15.63 in. (397.0 mm)
• Extended Length: 25.12 in. (638.0 mm)
• Upper Mount Type: Stem
• Lower Mount Type: Eye 12.4mm
• Reservoir: Yes (Remote or Piggyback, with bolt-on anodized chassis mount)
• Damping: Non-Adjustable (Fixed Valving)
• Finish: EVO Grey
• Boot Included: No
• Spring Seat Included: No
• Quantity Sold: Individually (1x per listing)
• Warranty: Lifetime Bilstein Limited Warranty

Included Components

• 1x Bilstein B8 8100 Rear Left Shock Absorber (25-294118)
• 1x Reservoir Chassis Mount (bolt-on, aluminum anodized)
• Hardware: Necessary washers, bushings, and nuts

Product Description

The Bilstein 25-294118 is a B8 8100 rear left shock absorber engineered for the 2007-2021 Toyota Tundra in both 4WD and 2WD configurations, compatible with factory ride height and up to 1.5" of rear lift. The B8 8100 standard series combines a 60mm large-bore monotube design with a remote or piggyback reservoir - stepping up significantly from a traditional monotube shock in both heat capacity and sustained performance. The monotube gas-pressure design keeps nitrogen gas and hydraulic fluid permanently separated, preventing the aeration and fade that degrade conventional twin-tube units under repeated hard use. The reservoir dramatically increases oil volume, giving this shock the heat dissipation needed to maintain consistent damping output on extended off-road sections, rough backcountry roads, and demanding towing conditions - the kind of sustained work that causes standard shocks to fade.

Velocity-sensitive digressive valving is tuned specifically for the Tundra's suspension geometry and weight, providing a ride quality that adapts smoothly between highway comfort and off-road control. Unlike the B8 8100 (Bypass) series, this is a fixed-valving, smooth-body monotube - there are no external adjusters, making setup simple and installation fully bolt-on using OEM mounting hardware. Sold individually as the rear left (driver side); two units are required for a complete rear axle replacement. Backed by Bilstein's Lifetime Limited Warranty for the original purchaser.