Fox 2.5 Factory Race Series Internal Bypass Rear Shocks (Pair) for 2019+ Sprinter 3500

Race-Proven Rear Suspension Control for The Sprinter 3500

Fox 2.5 FRS Internal Bypass Rear Shocks for 2019+ Mercedes Sprinter 3500

Fox’s Factory Race Series 2.5 Internal Bypass Rear Shocks bring race-proven damping technology to the 2019+ Mercedes Sprinter 3500, whether it’s configured as a van, motorhome, or Class C RV. Featuring internal bypass channels, piggyback reservoirs, and DSC EVO adjustability, these shocks deliver unmatched rear-end control, comfort, and durability on every journey.

The Fox 2.5 Factory Race Series Internal Bypass Rear Shocks are engineered to transform how your Sprinter 3500 motorhome or Class C RV handles heavy loads, rough highways, and technical off-road routes. Unlike standard monotube shocks, they use advanced internal bypass valving that provides variable damping throughout the shock’s travel—soft and forgiving on minor chatter, progressively firmer as the suspension compresses deeper.

A high-volume piggyback reservoir expands oil capacity for superior cooling, while Fox’s DSC EVO adjuster gives you precise control over both high- and low-speed compression. Built from a massive 2.5″ hard-anodized aluminum body, these shocks fight corrosion, dissipate heat, and resist fade mile after mile. With Sprinter-specific valving, they’re tuned for the unique weight distribution and load demands of motorhomes and Class C RVs, delivering premium performance on the highway, campsite approach roads, or rugged backcountry trails.

Internal bypass delivers more controlled ride quality

Fade-resistant damping under heavy load

On-the-fly compression adjustability for varied terrain

Tuned for Sprinter 3500 chassis dynamics and weight

Reliable performance for highway and off-road

Internal Bypass for Superior Ride Quality

Factory Race Series bypass valving

Designed with internal bypass channels, these shocks offer progressive damping throughout their travel. The result is a plush, compliant ride on small bumps with sharp stability when terrain gets demanding—race-proven performance, tuned for your Sprinter 3500 motorhome or Class C RV.

Cooling and Control Under Heavy RV Loads

Piggyback reservoir with DSC EVO adjuster

The integrated piggyback reservoir increases oil capacity for enhanced cooling, while the DSC EVO adjuster gives independent tuning of high- and low-speed compression. Easily tailor your suspension for highway miles, washboard trails, or a fully loaded Class C RV adventure.

Lightweight Strength, Built to Last

2.5″ hard-anodized aluminum body

CNC-machined from 6061-T6 aluminum with a Type III hard-anodized finish, these shock bodies are built to resist wear, corrosion, and heat. From cross-country RV road trips to rugged backroads, they deliver long-lasting durability for both everyday driving and serious overland use.

Sprinter-Specific Engineering for Motorhomes & RVs

Vehicle-specific geometry and valving

Fox designed these shocks specifically for the Mercedes Sprinter 3500 platform, with valving and geometry optimized for motorhomes and Class C RVs. The result: reduced body roll, greater rear stability, and confidence-inspiring control whether you’re driving across the country or venturing off the beaten path.

Specifications

• Fitment: 2019+ Mercedes-Benz Sprinter 3500 (AWD/4WD)
• Body Diameter: 2.5”
• Body Material: CNC-machined 6061-T6 aluminum, TYPE III hard anodized
• Adjustability: DSC EVO (High-/Low-speed compression)
• Reservoir: Piggyback external with VVC
• Damping: Internal bypass with race-inspired tuning
• Quantity: Pair (driver and passenger side)