Bilstein 25-311846 B8 5160 Remote Reservoir Rear Shock for 3-4 inch Lift | 2001-2024 GM 2500HD/3500HD 6.6L Duramax

Features:

• Designed for 3-4 inch lifted trucks
• Remote reservoir increases cooling capacity
• Monotube design prevents shock fade
• Velocity-sensitive digressive valving
• Swivel banjo fitting for clean routing
• Billet reservoir mount for sleek install
• Optimized for off-road performance
• Improves wheel travel and ride control
• Durable zinc-plated finish resists corrosion
• 46mm shock body for consistent damping
• Non-adjustable for hassle-free operation
• Perfect fit for GM 2500HD/3500HD trucks

Premium Rear Shock Absorber for HD GM Trucks

If you've lifted your Duramax and you're serious about performance both on and off the pavement, the Bilstein B8 5160 Rear Shock is the upgrade your truck’s suspension has been waiting for. Built specifically for 2001–2024 GM 2500HD and 3500HD models running 3 to 4 inches of lift, this shock isn't just a replacement—it's a performance leap. At the heart of the B8 5160 is Bilstein’s proven monotube design, offering fade-free damping and superior heat dissipation over traditional twin-tube shocks. But what really sets it apart is the remote reservoir system. That extra fluid capacity isn’t just for show—it plays a critical role in reducing heat buildup under heavy loads or during aggressive off-road driving. The result? More consistent performance, longer shock life, and better control when you need it most.

Precision-Engineered Design

Every detail is thoughtfully engineered for both function and fit. A 360-degree swivel banjo fitting allows for easy reservoir hose routing, and the included billet clamp keeps your reservoir mounted cleanly and securely. The digressive valving is application-specific, meaning it’s tuned just right for the weight and dynamics of your truck—whether you’re hauling a heavy trailer or navigating rocky terrain. Finished in zinc plating for long-term corrosion resistance and backed by Bilstein’s reputation for reliability, this shock delivers both durability and confidence. If your lifted Duramax is more than just a grocery-getter, this is the kind of gear that makes every mile smoother, every load more stable, and every trail more fun.

Fits: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 GM Silverado/Sierra 2500HD/3500HD with 3-4" Lift

Specifications:

• Collapsed Length (in): 18.14
• Extended Length (in): 31.28
• Collapsed Length (mm): 460.8
• Extended Length (mm): 794.5
• Finish: Zinc Plated
• Reservoir: Yes
• Body Design: Smooth Body (Non-Coilover)
• Body Diameter (id): 46mm
• Spring Seat Included: No
• Billet Reservoir Clamp Included: Yes
• Adjustable Damping: Non-Adjustable

Install Instructions