What does 'Internal Bypass' mean for this shock?

Internal bypass technology allows the shock to offer different damping rates in different parts of its stroke. This means it can provide a softer ride over small bumps while still offering firm control during large impacts or hard landings.

Is this shock absorber rebuildable?

Yes, this FOX Factory Series shock absorber is designed to be rebuildable and serviceable. This allows you to maintain its performance over time by replacing seals and re-charging the nitrogen if needed.

What is the benefit of the piggyback reservoir?

The piggyback reservoir holds extra shock oil, which helps to keep the shock cooler under heavy use. This improved heat management leads to more consistent damping performance, especially during long off-road runs or high-speed driving.

Fox 2.5 Factory Series 16in. Int. Bypass P/B Res. Coilover Shock 7/8in. Shaft (Custom Valving) - Blk

Specifications

Brand: FOX
Part #: 980-02-143-1
UPC: 714686854290

Fox 2.5 Factory Series 16in. Int. Bypass P/B Res. Coilover Shock 7/8in. Shaft (Custom Valving) - Blk

Name: Fox 2.5 Factory Series 16in. Int. Bypass P/B Res. Coilover Shock 7/8in. Shaft (Custom Valving) - Blk
Brand: FOX
SKU: fox-fox-2-5-factory-series-16in-int-bypass-p-b-res-coilover-shock-7-8in-shaft-cu-t14-178439
Price: 929.95 USD
Availability: BackOrder

$929.95

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

FOX 2.5 Factory Series 16in. Internal Bypass Coilover Shock with 7/8in. shaft and custom valving. Built for extreme off-road performance.

Key Features

This coilover shock features a 7/8-inch shaft made from 17-4 H900 stainless steel for strength and durability.
The 16-inch travel coilover design combines height adjustability with internal bypass damping for superior control.
A piggyback reservoir increases oil capacity and helps manage heat during demanding off-road use.
The shock body is constructed from a seamless alloy and is zinc-plated for corrosion resistance.
Black anodized CNC-machined aluminum components are used throughout for precise fit and finish.
This shock absorber is rebuildable and serviceable, allowing for long-term performance maintenance.

This is a universal coilover shock absorber. Fitment depends on custom suspension modifications and vehicle-specific requirements. Please consult with a suspension specialist to confirm compatibility with your build.

⚠️ 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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Product Details

The 7/8-inch diameter shaft on this FOX 2.5 Factory Series coilover shock is forged from 17-4 H900 stainless steel, a material chosen for its strength and resistance to bending under extreme loads. This shock absorber is designed for serious off-road use, offering a substantial 16 inches of travel and the adjustability of a coilover combined with the sophisticated damping control of an internal bypass system. The piggyback reservoir allows for additional oil capacity and heat dissipation, crucial for maintaining consistent performance during long, punishing runs over rough terrain.

FOX puts countless hours into developing race-winning suspension, and this coilover is a prime example. The seamless alloy body is zinc-plated for durability, while the black anodized CNC-machined aluminum components ensure precise fit and finish. This shock is rebuildable and serviceable, meaning you can maintain its performance over time. The custom valving ensures that the damping characteristics are tailored to your specific needs, whether you're tackling desert whoops or technical rock crawling. This isn't just a shock; it's a critical component for achieving reliable suspension control and a comfortable ride when you're pushing your vehicle to its limits.

When you're investing in a high-performance suspension component like this, it's important to consider that it's designed to work as part of a complete system. While this shock offers significant improvements in damping and adjustability, its full potential is realized when paired with appropriate springs and other suspension components. Because this shock features custom valving, it's essential to ensure it's specified correctly for your vehicle's weight and intended use to get the most out of its advanced design.