Fox Racing Shocks 981-44-403-C Factory Race 4.4x18 External Bypass 5-Tube Piggyback Shock Custom

The Fox Racing Shocks 981-44-403-C is a Factory Race Series 4.4" x 18" External Bypass Piggyback Shock with custom valving, purpose-built for serious off-road racing and high-performance truck suspension applications. This is FOX's flagship bypass shock platform, refined over decades of desert racing competition.

FOX External Bypass shocks deliver position-sensitive damping through an externally adjustable architecture, allowing tuners and drivers to precisely control compression and rebound characteristics at different points in the suspension travel. With five bypass tubes, this shock provides a highly configurable damping profile that adapts to varying terrain conditions — from high-speed desert whoops to technical rock crawling.

Key Features:

• 4.4" bore body with dual-coated steel construction and proprietary FOX Grey Cerakote® protective ceramic coating over a zinc-plated basecoat
• 5-tube external bypass configuration for maximum position-sensitive damping adjustability
• 18" travel for extreme suspension articulation
• All-new Gen 3 clicker adjuster for 1" bypass tubes — enables precise, repeatable tuning adjustments
• Piggyback reservoir for increased oil volume and improved heat dissipation during sustained high-speed use
• Rotating body cap with dedicated compression and rebound bypass adjusters plus free bleed adjuster
• Custom ("C") valving — shock is valved to specification, ideal for custom suspension builds
• Rebuildable and serviceable — designed for long-term race use with full rebuild support
• Black anodized CNC-machined aluminum components
• Eyelet top and bottom mounts

The 981-44-403-C variant carries the "C" suffix denoting custom valving, making it the choice for builders and race teams requiring shock tuning tailored to specific vehicle weight, spring rates, and suspension geometry. Fully rebuildable and supported by FOX's factory service network, this shock is engineered to perform at the highest levels of off-road competition.