Fox Racing Shocks 981-35-400-C Factory Race External Bypass Piggyback Shock - 3.5x12

The Fox Racing Shocks 981-35-400-C is a Factory Race Series 3.5-inch x 12-inch External Bypass Piggyback Shock — a custom-valved, competition-grade shock absorber engineered for serious off-road racing and high-performance applications. Built on Fox's renowned Factory Race platform, this shock delivers the precise damping control and durability demanded by professional racers and dedicated enthusiasts.

The 3.5-inch main body diameter provides a large fluid and gas volume, reducing heat buildup during extended high-speed off-road use. The 5-tube external bypass design with 3/4-inch bypass tubes allows independent tuning of compression damping at different points in the shock's travel, enabling highly customizable handling characteristics for varying terrain and race conditions. The integrated piggyback reservoir further expands fluid capacity to combat fade and maintain consistent performance lap after lap.

Key Features:

• Factory Race Series — competition-proven platform used by professional off-road race teams
• 3.5-inch body diameter x 12-inch stroke — high-volume design for maximum heat dissipation
• 5-tube external bypass configuration — provides independent compression damping zones for precise tuning
• 3/4-inch bypass tubes — large-diameter tubes for responsive, adjustable damping control
• Piggyback reservoir — expanded fluid volume minimizes damping fade under extreme use
• Custom valving — shock is custom-tuned to specific application or customer requirements
• Nitrogen-charged monotube design for consistent, aeration-free damping
• High-strength aluminum construction for reduced weight without sacrificing durability

Designed for applications where off-the-shelf shocks simply won't cut it, the Fox 981-35-400-C is ideal for desert racing, rock crawling, and other high-demand off-road disciplines. The custom designation indicates this unit is valved to a specific performance profile, making it a purpose-built solution for maximum control and reliability in the most demanding conditions.