Bilstein B8 5160 Rear Shock Absorber — (25-311914)

Direct-fit remote reservoir shock for 4WD Ram 2500 trucks with 0–1" rear lift and coil-spring suspension. Not for air-ride models. Built for work, towing, and off-road use without giving up everyday ride quality.

Upgrade the rear of your lifted Ram 2500 with the Bilstein B8 5160 Series shock absorber, part number 25-311914. This 46mm monotube remote-reservoir shock is application-tuned for 2014–2025 Ram 2500 4WD trucks with 0–1" of rear lift and coil-spring rear suspension. It is a bolt-on replacement that improves control, heat management, and wheel travel compared with a standard shock.

The remote reservoir adds oil capacity so the shock stays cooler and more consistent on long grades, washboard roads, and loaded hauls. Bilstein’s velocity-sensitive digressive valving reacts immediately to terrain changes: firm enough for trail and towing, composed enough for daily driving. A floating dividing piston in the reservoir supports extra shaft travel, and the 360° swivel banjo hose plus included billet reservoir clamp keep the install clean and low-profile.

Zinc-plated body, 14mm shaft, and a black bellows boot are built for truck use. Sold individually — order two for a complete rear pair.

Fits

• 2014–2025 Ram 2500 4WD
• Rear position
• 0–1" rear lift
• Coil-spring rear suspension only
• Not for factory air-leveling or air-ride rear suspension
• Compatible with common gas and diesel powertrains, including 5.7L, 6.4L, and 6.7L Cummins

Always confirm collapsed and extended length against your lift and aftermarket springs before purchase.

Key features

• Direct-fit B8 5160 remote reservoir design
• 46mm monotube body for fade-resistant damping
• Velocity-sensitive digressive valving, tuned for this application
• Remote reservoir for extra oil capacity, cooling, and travel
• 360° swivel banjo hose fitting
• Billet reservoir clamp included
• Zinc-plated finish
• Black bellows boot
• Gas-charged, non-adjustable
• Made in the USA
• Limited 2-year manufacturer warranty

Specifications

• Brand / series: Bilstein B8 5160
• Part number: 25-311914
• Position: Rear
• Quantity: Sold each (2 required per vehicle)
• Internal design: Monotube, gas charged
• Body / piston: 46mm piston, approximately 2.0" OD smooth body
• Shaft diameter: 14mm
• Reservoir: Yes, remote
• Adjustable damping: No
• Upper mount: Stem
• Lower mount: Eye 14.4mm
• Collapsed length: 16.42 in (417 mm)
• Extended length: 24.96–25.08 in (approximately 634–637 mm)
• Stroke: 8.54 in
• Finish: Zinc plated
• Boot: Black bellows
• Spring seat: No
• Country of origin: USA
• UPC: 651860899473

Installation notes Bolt-on using the factory rear mounting points. Reservoir location and hose routing are application-specific; use the included billet clamp and swivel fitting for a tidy mount. Replacement mounting kit, if needed: Bilstein B4-KT1-Z223A01. Professional installation is recommended if you are not experienced with heavy-duty truck suspension.