Fox Racing Shocks 981-20-042 Factory Race 2.0 x 3.0 Hydraulic Bump Stop Pinch Mount

The Fox Racing Shocks 981-20-042 is a Factory Race Series hydraulic bump stop engineered to provide precise control during the final inches of suspension travel. Developed in collaboration with top off-road racing teams, this 2.0-inch diameter bump stop with 3.0-inch stroke delivers race-proven damping technology in a compact, purpose-built component that prevents harsh bottoming while maximizing usable suspension travel.

Key Features:

• Threaded CNC Machined 6061-T6 Billet Aluminum Body: Black anodized aluminum construction provides superior strength and durability while allowing adjustable mounting height for fine-tuning bump stop engagement
• Hard Chrome Plated 1-1/4" 4130 Steel Shaft: Features Internal Floating Piston (IFP) that separates oil and nitrogen to prevent cavitation and bucking for consistent damping performance
• Tunable Nitrogen Pressure: Built-in FOX Air Valve (FAV) located at the bottom of the shaft allows easy adjustment of nitrogen charge to customize bottoming control for various conditions
• Replaceable Delrin® Strike Pad: Long-lasting pad protects the bump stop and ensures quiet operation even under extreme off-road conditions
• Velocity Sensitive Valving: Tunable deburred valve shims and heavy-duty powdered steel piston deliver precise damping control
• Redundant Sealing System: Includes main seal, wiper seal, and scraper seal to prevent leaks and maintain consistent performance
• Negative Coil Spring: Softens initial impacts and prevents harsh top-outs for smoother operation

Specifications:

• Body Diameter: 2.0 inches
• Stroke Length: 3.0 inches
• Shaft Diameter: 1.25 inches
• Extended Length: 13.11 inches (excluding nitrogen cap)
• Collapsed Length: 10.10 inches (excluding nitrogen cap)
• Mount Style: Pinch bolt mounting
• Valving: 807-24-007

This bump stop can be converted to a 4-inch stroke by cutting the internal spacer. Both the 981-20-042 (3" stroke) and 981-20-043 (4" stroke) share the same body and shaft design, providing upgrade flexibility.