FOX 981-25-040 Factory Series 2.5-Inch Bump Stop, FRS Stem Mount

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
• JM92 MIL-SPEC oil developed specifically for off-road racing
• Black Anodized CNC Machined Aluminum Components
• Hard Chrome Plated 4130 Chromoly Steel Shaft
• Hard chome plated 4130 chromoly steel shaft
• Owner serviceable and rebuildable

The FOX Factory Series 2.5-Inch Bump Stop is engineered for demanding off-road applications where suspension control, durability, and consistent performance are essential. Part number 981-25-040 features a 2.5-inch body with an FRS stem mount configuration, providing a robust solution for managing suspension compression during high-speed desert runs, technical trail driving, and other severe operating conditions.

FOX internal bypass technology allows the bump stop to deliver progressive damping throughout the stroke. Oil flow is controlled around the piston to provide a compliant response during initial engagement and increased support under heavier compression loads. This design helps improve chassis control and protects suspension components when the vehicle encounters large impacts or limited-travel situations.

The serviceable and rebuildable construction allows the unit to be maintained and configured for specific vehicle weights, terrain, and driving conditions. Black anodized CNC-machined aluminum components, a hard chrome-plated 4130 chromoly steel shaft, redundant seals, and FOX JM92 MIL-SPEC oil contribute to dependable operation in harsh environments. A proprietary Cerakote protective ceramic coating over a zinc-plated basecoat adds further resistance to wear and corrosion. Custom valving options are available through qualified suspension specialists.

What's Included: One FOX Factory Series 2.5-Inch Bump Stop with FRS stem mount configuration. Vehicle-specific fitment should be verified before installation. This product is intended for automotive off-road suspension applications and is not CARB approved.

Features:

• Internal Bypass Technology: Provides progressive damping and enhanced suspension control across the compression stroke.
• Factory Series Performance: Race-developed design delivers consistent support during high-speed and technical off-road driving.
• Serviceable and Rebuildable: Owner-serviceable construction allows maintenance, rebuilding, and qualified custom valving.
• Heavy-Duty Materials: Combines CNC-machined aluminum components, a hard chrome-plated 4130 chromoly steel shaft, redundant seals, and protective Cerakote coating.

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: t
Units Per Sku: 1