Fox 2.5 HTO Performance Series Front Shock (SINGLE) 0"-2.5" 2001-2010 GM HD Truck (AX4074)

Fitment

The Axiom Supply AX4074 FOX 2.5 Performance Series Front Shock is designed as a direct-fit performance upgrade for 2001-2010 GM HD trucks with stock-height through 2.5" leveled front suspension configurations.

Chevrolet / GMC HD Trucks

Chevrolet Silverado 2500HD – 2001-2010

GMC Sierra 2500HD – 2001-2010

Chevrolet Silverado 3500 / 3500HD – 2001-2010

GMC Sierra 3500 / 3500HD – 2001-2010

Fitment Notes

Fits applicable 2WD and 4WD models.

Compatible with gas and Duramax diesel applications.

Designed for stock height through 2.5" of front lift / leveling.

Fits both 2001-2007 Classic and 2007.5-2010 New Body Style GM HD trucks.

Designed as a direct replacement for the factory-style front shock mounting locations.

Sold Individually – Two shocks are required to service both front positions.

Features

FOX 2.5 Performance Series Technology – The larger 2.5" shock body and piston assembly provide increased damping capacity and suspension control compared with smaller conventional replacement shocks.

Vehicle-Specific Performance Valving – Engineered specifically around the weight, suspension architecture, and operating characteristics of the GM HD truck platform to provide controlled handling without sacrificing daily-driver comfort.

0–2.5" Ride Height Range – Specifically sized for stock-height through 2.5" leveled front suspension applications, making the AX4074 an ideal match for factory trucks and torsion-key leveling systems.

Internal Floating Piston Design – FOX's monotube IFP architecture physically separates the shock oil from the high-pressure nitrogen gas charge, helping prevent aeration and maintain consistent damping performance.

High-Flow Velocity-Sensitive Damping – Internal damping responds to suspension shaft velocity, providing controlled movement over large impacts while remaining responsive over smaller road imperfections.

2.5" 6061-T6 Aluminum Body – Impact-extruded aluminum construction provides exceptional strength while dissipating heat significantly more efficiently than conventional steel shock bodies.

Type II Clear-Anodized Finish – Protects the aluminum shock body against corrosion and harsh environmental exposure while maintaining FOX's distinctive premium finish.

5/8" Hard Chrome Shock Shaft – Heavy-duty shock shaft construction provides the strength and durability required for the weight and suspension loads generated by GM HD trucks.

Direct Bolt-On Installation – Utilizes a factory-style stem upper mount and eyelet lower mount for straightforward installation without custom shock brackets.

Built for Heavy-Duty Use – Engineered for daily driving, towing, hauling, larger tires, leveled suspension systems, rough roads, and off-road use.

Description

Race-Proven Performance. Heavy-Duty Truck Control. Daily Driver Comfort.

The Axiom Supply AX4074 FOX 2.5 Performance Series Front Shock brings FOX's race-developed suspension technology to the 2001-2010 GM Silverado and Sierra 2500HD and 3500HD platform in a direct bolt-on package.

Factory GM HD trucks are heavy vehicles, and that weight becomes even more demanding on the suspension when larger tires, leveling kits, aftermarket equipment, towing loads, and rough terrain are introduced.

Rather than simply replacing the factory shock with another conventional damper, the AX4074 utilizes FOX's substantially larger 2.5" Performance Series monotube architecture to increase damping capacity and provide more consistent suspension control.

At the center of the shock is FOX's Internal Floating Piston system, which separates the shock oil from the high-pressure nitrogen gas chamber. Keeping the oil and gas separated helps prevent aeration and maintains consistent damping as the shock cycles rapidly and operating temperatures increase.

FOX combines this architecture with high-flow velocity-sensitive damping and vehicle-specific valving developed for the GM HD platform.

The result is a shock capable of maintaining a comfortable, controlled ride during everyday highway driving while providing substantially more confidence when encountering broken pavement, larger suspension movements, towing conditions, washboard roads, and off-road terrain.

The large 2.5" impact-extruded 6061-T6 aluminum body also provides excellent thermal management. Aluminum transfers heat efficiently away from the shock oil, helping maintain consistent damping during extended periods of demanding suspension use.

A 5/8" hard chrome shock shaft, Type II clear-anodized body, premium internal components, and FOX's proven monotube construction complete a shock designed for serious heavy-duty truck use.

Most importantly for leveled GM HD trucks, the AX4074 is specifically sized to accommodate stock height through 2.5" of front lift, allowing additional ride height without forcing a factory-length shock outside its intended operating range.

Whether your GM HD is a daily-driven Duramax, tow rig, work truck, leveled street truck, or weekend off-road build, the Axiom Supply AX4074 FOX 2.5 Performance Series Front Shock delivers the damping capacity, heat management, ride control, and durability expected from a premium FOX suspension upgrade.

Specifications

Axiom Part Number: AX4074

FOX Part Number: 987-24-074

Position: Front

Series: FOX 2.5 Performance Series

Shock Type: Monotube IFP

Ride Height: Stock / 0" through 2.5" Front Lift

Shock Body Diameter: 2.5"

Body Material: Impact-Extruded 6061-T6 Aluminum

Body Finish: Type II Clear Anodized

Shock Shaft: 5/8" Hard Chrome

Damping: High-Flow Velocity-Sensitive

Travel: 4.39"

Extended Length: 15.69"

Compressed Length: 11.30"

Upper Mount: Stem

Lower Mount: Eyelet

Includes

(1) Axiom Supply AX4074 FOX 2.5 Performance Series Front Shock

FOX Part Number 987-24-074

Installation Bushings / Hardware as supplied with shock

SOLD INDIVIDUALLY

Quantity (2) required for complete front shock replacement.

Interchange

Axiom Supply AX4074

FOX 987-24-074

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The Axiom No-Nonsense Lifetime Warranty

Our suspension components are warrantied for life to the original purchaser against any manufacturer defects, premature wear, or breakage.

Push it to the limit—we don't care.

If the part lets you down, we will make it up to you!