FOX Off-road Shocks FRS 4.0″ x 18″ External Bypass 5 Tube Piggyback 981-40-403-R



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FOX dedicates significant resources to enhance the performance of the Fox Shocks 981-40-403-R Factory Race Series 4.0″ x 18″ External Bypass 5 Tube Piggyback through thorough research and development. Whether navigating desert landscapes or tackling steep inclines on rocky terrain, our shocks are designed to deliver outstanding damping, precise suspension control, and optimal spring rates to conquer any challenge with ease.

  • Black Anodized CNC Machined Aluminum Components
  • Dual coated steel body with proprietary FOX Grey Cerakote® protective ceramic coating over zinc plated base-coat
  • Fox Racing Oil Developed For Ultimate Performance
  • 1-1/8″ hard chrome plated 17-4 H900 stainless steel shaft
  • Packed Race Winning Technology

Additional information

Weight 65 lbs
Dimensions 48 × 10 × 10 in

Off Road Shocks


Shaft Diameter






Fox Grey Cerakote

Bypass Layout

Right Side


Compressed Length: 46.55″

Extended Length: 28.55″

Travel: 18″

Shaft Diameter: 1 1/8″

Cylinder Plating: Fox Grey Cerakote / Shock Parts: Black Anodize

Reservoir: Piggyback 3.5″ x 17.5″

Tubes: (3) Compression / (2) Rebound

Mounting Width: 5/8″ x 1.5″