Zone Offroad D136F 4.5-Inch Radius Arm Lift System with Fox 2.0 Adventure Series Shocks

The Zone Offroad D136F is a complete 4.5-inch radius arm suspension lift system engineered specifically for 2013–2018 Ram 3500 4WD diesel trucks. This system delivers 4.5 inches of front lift via progressive-rate coil springs and heavy-duty fabricated radius arms, paired with a 2-inch rear lift block and long U-bolts to level the stance — all topped off with Fox 2.0 Adventure Series shocks for premium on- and off-road performance.

At the core of this kit are fully boxed, internally gusseted replacement radius arms that bolt directly into the factory mounting locations. The arms utilize extra-large, greaseable frame bushings and retain the factory alignment cams at the axle for proper adjustability, while correcting caster geometry at lifted height and maximizing tire clearance.

Key Features:

• 4.5" front lift using progressive-rate full-length replacement coil springs for improved ride quality on any terrain
• Heavy-duty fabricated radius arms — fully boxed, internally gusseted, and engineered to correct caster and improve ground clearance over drop-bracket systems
• 2" rear lift via cast rear lift blocks and longer U-bolts to level the stance and allow fitment of up to 37" tires
• Fox 2.0 Adventure Series IFP shocks — monotube design with internal floating piston (IFP) separating shock oil from high-pressure nitrogen charge for fade-free, consistent damping
• Forged drop pitman arm to correct steering angles after lifting
• Heavy-duty track bar relocation bracket to properly re-center the front axle under the truck
• Front sway bar relocation to maintain factory-like handling and stability
• Brake line relocation brackets to maintain proper brake line routing
• Extended bump stops to prevent over-travel at full suspension compression
• No cutting or welding required — 100% bolt-on installation
• Powdercoated steel construction for long-term durability
• Accommodates up to 37" tires

Important Notes: Front driveline vibration may occur at speeds over 35 mph in 4WD after installation. If this occurs, install the optional transfer case indexing ring kit — part #D5623 for 6-bolt transfer cases or #D5813 for 8-bolt transfer cases. Trucks equipped with a two-piece rear driveshaft and carrier bearing may require optional carrier bearing drop kit. Not compatible with factory rear air/airbag suspension models or dually configurations.

Zone Offroad lift kits are made in the USA and backed by a Shield Lifetime Warranty, making the D136F a reliable, long-term upgrade for Ram 3500 owners seeking improved stance, ground clearance, and off-road capability.