2017–2026 Ford F-250 / F-350 Super Duty Rear FOX 2.5 Performance Series HTO Shock (2–3.5" Lift)

Upgrade your suspension with the FOX 2.5 Performance Series HTO shock, engineered to deliver superior ride quality, increased damping capacity, and enhanced control both on and off-road. This bolt-on shock features position-sensitive technology, vehicle-specific valving, and a larger 2.5-inch shock body to handle demanding conditions with confidence. The internal floating piston (IFP) design separates shock oil from high-pressure nitrogen for consistent, fade-resistant performance, while the Type II anodized aluminum body efficiently dissipates heat and resists corrosion.

Hydraulic Top Out (HTO) technology provides advanced rebound damping control by slowing shock shaft speed through a secondary shim stack, reducing harsh top-outs and improving overall ride comfort. This makes it especially effective for vehicles running larger, heavier tires or operating at ride heights above factory specifications.

Key Features

• 2.5” impact extruded 6061-T6 aluminum shock body
• Type II clear-anodized body plating for corrosion resistance
• Hydraulic Top Out (HTO) piston for position-sensitive rebound control
• Internal Floating Piston (IFP) design for consistent damping
• High-flow velocity-sensitive damping
• 5/8” hard chrome shaft for strength and durability
• 11.19” travel length
• Extended length: 30.58”
• Compressed length: 19.39”
• Eyelet top and bottom mounts
• Designed for 2–3.5” lift applications
• Bolt-on installation for straightforward upgrade

Performance Benefits

• Reduces harsh top-out conditions for smoother ride quality
• Improves control with larger tires and lifted applications
• Increases damping capacity over standard shocks
• Enhances stability both on-road and off-road
• Maintains consistent performance under heavy use

Construction

• 2.5” aluminum shock body
• Internal floating piston (IFP) design
• High-pressure nitrogen charged
• Corrosion-resistant anodized finish

Installation

• Difficulty: Easy to Moderate
• Estimated Time: 1–2 hours
• Hardware: Typically reuses factory mounting hardware

Fitment

• 2017–2026 Ford F-250 Super Duty (Rear, 4WD)
  • Includes XL, XLT, Lariat, King Ranch, Platinum (2025 confirmed trims)
• 2017–2026 Ford F-350 Super Duty (Rear, 4WD)
  • Includes XL, XLT, Lariat, King Ranch, Platinum, Limited (2018–2024 Limited confirmed)
• Designed for 2–3.5” rear lift applications

What’s Included

• (1) FOX 2.5 Performance Series HTO Rear Shock

Notes

• Rear shock only
• Ideal for lifted trucks and heavier wheel/tire setups
• Designed as a direct bolt-on upgrade
• Sold individually