BDS 6 Inch Lift Kit | Ram 3500 Diesel (2013-2018) 4WD | 4 Inch Block Kit | 6-Bolt | NX2 Nitro Series

This configuration uses a 4 Inch Block Kit in the rear — providing a tail-low to level stance — with the 6-Bolt indexing ring kit (standard fitment) and NX2 Nitro Series shocks. The cast iron block is engineered to correct pinion angles, reduce axle wrap, and maintain factory payload ratings. NX2 shocks feature a nitrogen-charged twin-tube design, 10-stage velocity-sensitive valving, dual-welded ends, a 1-3/8-inch high-flow piston, self-lubricating seals, and a silver powder coat finish.

Overview

This 6-inch lift kit from BDS Suspension is designed for 2013–2018 RAM 3500 diesel-powered 4WD trucks, providing improved stance, performance, and capability with clearance for up to 37-inch tires. Up front, the kit includes diesel-specific Pro-Ride coil springs, radius arm drop brackets, a forged drop pitman arm, a track bar bracket for steering correction, bump stops, and brake line brackets. In the rear, the kit utilizes a high-strength fabricated lift block (or replacement leaf springs, depending on configuration), longer U-bolts, and a matched set of precision-tuned shocks.

Features

• Heavy duty radius arm drop brackets maintain proper suspension geometry
• Diesel-specific, full-length progressive rate Pro-Ride coil springs for correct lift height and smooth ride across various terrains
• Front track bar relocation bracket to re-center the front axle
• Forged drop pitman arm to correct steering angles
• Front sway bar correction to maintain handling performance
• HD transmission crossmember and transfer case indexing ring to correct front driveline angles and allow use of factory driveshafts
• Rear high-strength fabricated lift block, longer U-bolts (block kit configurations)
• NX2 Nitro Series or FOX 2.0 Performance Series shocks (see variant descriptions for details)

Specifications

• Lift height: 6 inches
• Tire clearance: up to 37 inches
• Rear block options: 4-inch block (tail-low to level stance) or 5-inch block (level to tail-high appearance)
• Rear blocks: cast iron construction for high strength
• Rear blocks designed to provide correct pinion angles, reduce axle wrap, and maintain factory payload weight ratings
• Rear leaf spring multi-leaf progressive design for smooth ride (leaf spring configurations)
• Transfer case indexing ring: 6-bolt (standard) or 8-bolt (Aisin transmission fitment)
• 8-bolt kit includes internal shaft seal extension and new shaft seal

Installation

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

Important Notes

The carrier bearing drop is necessary for models equipped with the two-piece rear drive shaft. Dually with 8-bolt Transmission (Aisin), require BDS122409 Def Relocation Kit. Mega Cabs with 8-bolt Transmission (Aisin), require BDS122409 Def Relocation Kit. Vehicles equipped with a Manual T-case requires BDS122423 Manual transfer case shifter extension. Vehicles equipped with a 2-piece rear drive shaft (carrier bearing), require BDS122406 Carrier bearing drop. Some vehicles may require a rear driveshaft spacer kit 122007 to maintain adequate rear driveshaft engagement.