Bilstein 25-344820 B8 8100 ZoneControl R DSA Rear Reservoir Shock Absorber

The Bilstein 25-344820 B8 8100 ZoneControl R DSA is a premium rear reservoir shock absorber engineered as a direct-fit solution for lifted trucks and heavy-duty SUVs. Featuring an adjustable large-bore 60mm (2.65" OD) monotube design, this shock delivers consistent, fade-free performance across all driving conditions — whether you're hauling, towing, or navigating challenging terrain.

Key Features:

• Dual Speed Adjustment (DSA): Click adjuster knobs allow easy and precise adjustment of both low-speed and high-speed compression, letting you tailor your ride to any road surface or load condition
• ZoneControl R Technology: Revolutionary double-piston technology delivers position-sensitive rebound damping, eliminating harsh suspension top-out events and eliminating the need for an external limit strap
• Large-Bore 60mm Monotube Design: Provides superior heat dissipation and consistent, fade-free damping performance under heavy use
• Velocity-Sensitive Digressive Valve Settings: Tuned specifically for each application to deliver optimal comfort and control across varying road conditions
• Remote or Piggyback Reservoir: Offers a unique reservoir configuration for easy, hassle-free installation
• 18mm Shaft Diameter: Heavy-duty shaft construction for durability under demanding use
• EVO Grey Finish: Corrosion-resistant finish built for long-term durability
• Direct-Fit Installation: Bolt-on replacement requiring no modifications — upper mount Eye 16mm, lower mount Eye 14.1mm

Specifications:

• Series: B8 8100 (ZoneControl R DSA)
• Internal Design: Monotube
• Piston Diameter: 60mm (2.65" OD)
• Shaft Diameter: 18mm
• Collapsed Length: 18.03 in (458.0 mm)
• Extended Length: 30.15 in (765.8 mm)
• Upper Mount Type: Eye 16mm
• Lower Mount Type: Eye 14.1mm
• Reservoir: Yes
• Adjustable Damping: Double Adjustable Compression with Click Adjuster Knobs
• Body Design: Smooth Body (Non-Coilover)
• Finish: EVO Grey
• Boot Included: No
• Spring Seat Included: No
• UPC: 651860966212

The Bilstein B8 8100 ZoneControl R DSA is the ultimate choice for truck and SUV owners who demand unmatched adjustability, ride quality, and control — especially on lifted platforms that see heavy-duty or off-road use.