4 Inch Lift Kit w/ Radius Arm | 2013-2018 Ram 3500 4WD Diesel w/ Rear Air Ride | FOX 2.0 Performance Series Shocks | BDS Suspension

This kit is configured with FOX 2.0 Performance Series IFP nitrogen-charged shocks front and rear, delivering enhanced damping performance and off-road capability.

Overview

This 4-inch radius arm lift kit from BDS Suspension is designed for 2013–2018 RAM 3500 diesel-powered trucks equipped with factory rear air ride. The kit improves stance, performance, and capability while providing clearance for up to 35-inch tires. Up front, it includes diesel-specific Pro-Ride coil springs, heavy duty tubular radius arms, a forged drop pitman arm, a track bar drop bracket for steering correction, bump stops, and brake line brackets. In the rear, the kit uses a high-strength fabricated lift block, a heavy duty air bag spacer, longer u-bolts, and a matched set of shocks.

Pro-Ride Coil Springs

A pair of full-length, diesel-specific, progressive rate Pro-Ride coil springs provide the correct lift height and smooth, predictable ride across various terrains.

HD Radius Arms

In place of the factory stamped steel radius arms, BDS supplies a pair of high-strength tubular radius arms. These arms mount into the factory location and offer caster adjustment for a wide range of lift heights, along with an OE-style rubber bushing at the frame mount for smooth, quiet, service-free operation.

Steering Correction

A forged drop pitman arm minimizes steering angle after lifting. A heavy duty track bar drop bracket keeps steering geometry in phase through suspension travel while recentering the front axle.

Features

• Heavy duty tubular radius arms for improved strength, handling, and caster control
• Diesel-specific progressive rate Pro-Ride coil springs for a smooth ride on any terrain
• Front track bar relocation bracket to re-position the front axle
• Forged drop pitman arm to correct steering angles
• High-strength fabricated rear lift block and heavy duty air bag spacer
• Longer rear u-bolts included
• Compatible with BDS NX2 Nitro Series or FOX 2.0 Performance Series IFP nitrogen-charged shocks
• Provides clearance for up to 35-inch tires

Installation

• Estimated Time: 6–8 hours
• Difficulty: Moderate
• Tools Required: Drill / Bit Set, Pitman Arm Puller, Welding Equipment

Important Notes

The carrier bearing drop is necessary for models equipped with a two-piece rear drive shaft. Some vehicles may require rear driveshaft spacer kit 122007 to maintain adequate rear driveshaft engagement.