Bilstein 25-326857 B8 8100 DSA Rear Shock 2015-2025 Ford F-150 4WD Excl Raptor

Vehicle Fitment

• 2015-2025 Ford F-150 King Ranch (4WD) - Rear
• 2015-2025 Ford F-150 Lariat (4WD) - Rear
• 2016-2023 Ford F-150 Limited (4WD) - Rear
• 2015-2025 Ford F-150 Platinum (4WD) - Rear
• 2015-2025 Ford F-150 XL (4WD) - Rear
• 2015-2025 Ford F-150 XLT (4WD) - Rear
• 2024-2025 Ford F-150 Tremor (4WD) - Rear

Fitment Notes

• Excludes Ford F-150 Raptor - the Raptor uses dedicated, purpose-built suspension not compatible with this shock.
• 4WD models only.
• Designed for 0-0.5 inches of rear lift at stock or mildly lifted ride height.
• Rear position, left or right - sold as a single shock absorber. Order 2 for a complete rear axle replacement.
• IMPORTANT - Wheel Backspacing Requirement: This shock absorber (25-326857) is NOT compatible with OE/stock wheel backspacing. Aftermarket wheels with 5.75" backspacing or less are required to clear the shock body and reservoir assembly. Verify wheel clearance before ordering. The maximum tire width that will clear with a 5.75" backspaced wheel is 295.
• Reservoir mount hardware is included. An optional billet aluminum reservoir clamp (Bilstein 11176015, sold separately) is available for a cleaner installation.
• Factory shock mounting hardware is reused for installation. Replacement mounting kit: B4-KT2-Z020A00.
• Pairs with Bilstein B8 8112 front coilovers for a complete front and rear upgrade kit (1.6-2.5" front lift, up to 0.5" rear lift).

Features

• Bilstein B8 8100 DSA (Dual Speed Adjustable) - Bilstein's top-tier direct-fit reservoir shock for the F-150 platform, offering externally adjustable compression damping for both low-speed and high-speed inputs via click adjuster knobs - enabling precise on-the-fly tuning for different terrain and load conditions without tools.
• 60mm digressive piston in a 2.65" OD monotube body with remote or piggyback reservoir provides maximum oil volume, heat dissipation, and aeration resistance for sustained high-performance off-road use where smaller shocks fade and lose control.
• Dual Speed Adjustment (DSA) - independent low-speed and high-speed compression adjusters allow tuning of body roll and harshness separately, giving advanced users precise control over the shock's behavior at different input frequencies.
• 18mm shaft diameter with aerospace-quality billet components for superior durability and long-term serviceability under repeated high-load impacts.
• Application-specific velocity-sensitive digressive valve settings tuned for the 13th/14th-generation F-150's rear suspension geometry and load characteristics.
• EVO Grey finish for corrosion resistance and a premium appearance.

Specifications

• Part Number: 25-326857
• Series: Bilstein B8 8100 (DSA - Dual Speed Adjustable)
• Position: Rear (Left or Right)
• Internal Design: Monotube Gas Pressure
• Piston Diameter: 60mm Digressive
• Body Outer Diameter: 2.65"
• Shaft Diameter: 18mm
• Upper Mount Type: Eye 12mm
• Lower Mount Type: Eye 12mm
• Extended Length: 27.56" (700.0mm)
• Collapsed Length: 16.99" (429.0mm)
• Rear Lift Range: 0-0.5"
• Body Design: Smooth Body (Non-Coilover)
• Finish: EVO Grey
• Boot Included: No
• Reservoir: Yes (Remote/Piggyback)
• Weight: 15 lbs
• Replacement Mounting Kit: B4-KT2-Z020A00
• Wheel Backspacing Requirement: 5.75" or less (NOT compatible with OE backspacing)
• Warranty: 2 Years (against manufacturer defects)

Included Components

• 1x Bilstein B8 8100 DSA Rear Monotube Shock Absorber with Reservoir (25-326857)
• 1x Reservoir mounting hardware

Product Description

The Bilstein 25-326857 is a B8 8100 DSA (Dual Speed Adjustable) rear shock absorber for the 2015-2025 Ford F-150 in 4WD configuration - all trims excluding the Raptor - designed for 0-0.5 inches of rear lift. The B8 8100 DSA is Bilstein's highest-specification direct-fit rear shock for the F-150 platform, combining the large-bore 60mm reservoir monotube design with externally adjustable dual-speed compression tuning that lets the driver dial in the shock's behavior for street driving, loaded hauling, or aggressive off-road terrain via click adjuster knobs.

The 60mm piston in a 2.65" OD body with remote or piggyback reservoir provides substantially more oil volume and heat dissipation than the 5100 or standard 8100 non-DSA versions - keeping damping consistent through sustained off-road use. Independent low-speed and high-speed compression adjustment knobs allow advanced users to tune body roll and impact harshness separately, a level of tuning previously reserved for race