FOX Factory Race 2.5 x 12 Coilover Piggyback Shock, Part Number FOX981-25-113

FOX devotes countless hours of research and development to design race-winning suspension that withstands incredible punishment and provides consistent performance you can rely on. Regardless of whether you are flying high over the desert or struggling to stick to a rock face on an off-camber climb, our shocks will give you the damping performance, suspension control and proper spring rate to get the job done. Rebuildable and serviceable. Custom valving options available. Uncompromised performance through FOX’s patented internal bypass technology delivers the feel of near-endless suspension travel. Exclusive internal bypass technology allows oil to flow around the piston at some points of the stroke – while creating humongous pressure at other points – supporting the vehicle like no other product can. Floating through terrain is accomplished with FOX’s ride zone – combining a race-developed shock piston, internal bypass and Dual Speed Compression adjustment – allowing fine tuning for weight, terrain and speed. Dominate any terrain with the brute strength of 3- and 2.5-inch aluminum bodies, cactus cooler reservoirs and 7/8” shafts with redundant seals, all proven in the harshest of environments under the toughest of conditions.

• NEW proprietary Cerakote® protective ceramic coating over zinc plated basecoat
• NEW Proprietary Cerakote Protective Ceramic Coating Over Zinc Plated Basecoat
• JM92 MIL-SPEC oil developed specifically for off-road racing
• 17-4 H900 hard chrome plated stainless steel shaft
• Black Anodized CNC Machined Aluminum Components
• Owner serviceable and rebuildable

The FOX Factory Race 2.5 x 12 Coilover Piggyback Shock is engineered for demanding off-road applications where suspension control, consistent damping, and serviceability are essential. Part number FOX981-25-113 uses FOX internal bypass technology to manage damping throughout the shock stroke, helping provide controlled suspension response over high-speed terrain, technical trails, and changing obstacles.

Its ride-zone performance combines a race-developed piston, internal bypass, and Dual Speed Compression adjustment to help fine-tune the shock for vehicle weight, terrain, and driving speed. The piggyback reservoir supports consistent performance during extended, high-demand use, while the robust aluminum body and 7/8-inch shaft are designed to withstand harsh off-road conditions. Custom valving options are available for applications requiring more specific suspension tuning.

FOX builds this serviceable and rebuildable shock with a proprietary Cerakote protective ceramic coating over a zinc-plated basecoat, black-anodized CNC-machined aluminum components, and a 17-4 H900 hard-chrome-plated stainless steel shaft. JM92 MIL-SPEC oil, developed specifically for off-road racing, supports reliable damping performance across demanding conditions. The FOX Factory Race 2.5 x 12 Coilover Piggyback Shock is intended for automotive off-road suspension applications; verify vehicle fitment, mounting configuration, spring requirements, and valving before installation.

Key Product Specifications & Technical Data

• Brand: FOX
• Part Number: FOX981-25-113
• Product Type: Coilover piggyback shock
• Application: Automotive off-road suspension
• Shock Configuration: 2.5-inch race shock with piggyback reservoir
• Adjustment: Dual Speed Compression adjustment
• Shaft Construction: 17-4 H900 hard-chrome-plated stainless steel
• Serviceability: Owner serviceable and rebuildable

What's Included

One FOX Factory Race 2.5 x 12 Coilover Piggyback Shock. Coil spring, vehicle-specific mounting hardware, and installation accessories are not specified and should be confirmed for the intended application.

Features:

• Internal Bypass Technology: Controls oil flow through multiple zones of the shock stroke to deliver consistent damping and suspension control.
• Dual Speed Compression Adjustment: Enables tuning for vehicle weight, terrain, and driving speed.
• Rugged Race Construction: Combines an aluminum body, piggyback reservoir, 7/8-inch shaft, and redundant sealing for demanding off-road use.
• Serviceable and Rebuildable Design: Allows owner maintenance, rebuilding, and custom valving support when required.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: false
Units Per Sku: 1