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Auto Barn
Est. 1957
FOX

Fox 4.0 Factory Race Shaft 5-Tube External Bypass 18in Piggyback Shock - Left

$3259.95

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Fox 4.0 Factory Race Shaft 5-Tube External Bypass Piggyback Shock - Left. Race-winning suspension for consistent performance.

Key Features

  • Fits left side application.
  • Features a 4.0-inch diameter body with a 5-tube external bypass design for advanced damping control.
  • Constructed with a 17-4 H900 hard chrome plated stainless steel shaft for strength and corrosion resistance.
  • Utilizes proprietary JM92 MIL-SPEC oil, formulated for consistent performance in off-road racing conditions.
  • Components are CNC machined from aluminum and finished with black anodizing.
  • Includes a new proprietary Cerakote protective ceramic coating over a zinc-plated basecoat for enhanced durability.
This is a specific shock absorber designed for custom applications. Please consult with a suspension specialist or the manufacturer to confirm compatibility with your vehicle's suspension setup.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

When you're pushing your vehicle to its limits, whether that's flying over desert terrain or navigating tough rock climbs, you need suspension that can handle the punishment and deliver reliable control. This Fox 4.0 Factory Race Shaft 5-Tube External Bypass Piggyback Shock is built for those demanding situations. It's designed to provide the damping performance and suspension control necessary to keep your vehicle planted and responsive, no matter how rough the trail gets.

This shock absorber is a well-built piece of equipment, featuring a 17-4 H900 hard chrome plated stainless steel shaft for durability. The components are CNC machined from aluminum and finished with a black anodizing. It also includes a proprietary JM92 MIL-SPEC oil, specifically developed for the rigors of off-road racing, ensuring consistent performance even under extreme conditions. A notable feature is the protective Cerakote coating over a zinc-plated basecoat, adding an extra layer of defense against the elements.

This shock is designed to be owner serviceable and rebuildable, meaning you can maintain its performance over time. Custom valving options are also available, allowing you to fine-tune the shock's characteristics to your specific needs and driving style. This is a serious piece of suspension hardware for those who demand the best.

Specifications

Brand
FOX
Manufacturer Part #
981-40-403-L
UPC
711745593916

Frequently Asked Questions

Fox 4.0 Factory Race Shaft 5-Tube External Bypass 18in Piggyback Shock - Left

$3259.95