2017–2026 Ford F-250 / F-350 Super Duty Rear Fox 2.5 Performance Series HTO Shock (4–6" Lift)

Upgrade your suspension with the Fox 2.5 Performance Series HTO Shock Absorber, engineered to deliver improved control, comfort, and durability both on and off the road. This bolt-on shock features position-sensitive technology, vehicle-specific valving, and a larger 2.5-inch piston design to significantly enhance damping performance. The Type II anodized aluminum body efficiently dissipates heat while resisting corrosion, and the internal floating piston (IFP) separates shock oil from high-pressure nitrogen to maintain consistent, fade-resistant performance.

Hydraulic Top Out (HTO) technology provides advanced rebound control by slowing shock shaft speed at full extension, reducing harsh top-outs and improving ride quality. This added control is especially beneficial for vehicles running heavier, more aggressive tires or operating at lift heights above factory specifications.

Key Features

• 2.5" impact extruded 6061-T6 aluminum shock body
• Type II clear-anodized body plating for corrosion resistance
• High-flow, velocity-sensitive damping
• 5/8" hard chrome shock shaft
• Internal floating piston (IFP) for consistent damping performance
• Hydraulic Top Out (HTO) piston for position-sensitive rebound control
• 12.69" travel
• Extended length: 33.88"
• Compressed length: 21.29"
• Upper mount: Eyelet
• Lower mount: Eyelet
• Designed for 4–6" lift applications
• Direct bolt-on installation

Performance Benefits

The Fox 2.5 Performance Series HTO shock is designed to handle increased demands from lifted applications and larger tire setups. With added damping capacity and controlled rebound characteristics, it improves stability, reduces suspension harshness, and enhances overall ride comfort across a wide range of driving conditions.

Construction & Design

• Body: Type II anodized 6061-T6 aluminum
• Shock Type: Monotube with internal floating piston (IFP)
• Technology: Hydraulic Top Out (HTO)
• Shaft: 5/8" hard chrome plated
• Gas Charge: High-pressure nitrogen

Installation

• Install Time: ~1–2 hours
• Difficulty: Easy to moderate
• Mounting: Direct bolt-on replacement

Notes:

• Reuses factory mounting hardware unless otherwise specified
• Professional installation recommended if unfamiliar with suspension work

Fitment

Ford Super Duty Rear Applications (4–6" Lift):

• 2017–2026 Ford F-250 Super Duty (4WD, All Trims)
• 2017–2026 Ford F-350 Super Duty (4WD, All Trims including XL, XLT, Lariat, King Ranch, Platinum, Limited)

Fits rear applications only on trucks equipped with 4–6 inches of lift. Confirm compatibility with your specific setup before purchase.

What’s Included

• (1) Fox 2.5 Performance Series HTO Rear Shock Absorber