BDS 6 Inch Long Arm Lift Kit | 2008 Dodge Ram 2500/3500 4WD Diesel | Block Kit | 3-1/2 Inch Axle | NX2 Nitro Series

Rear lift is achieved via a cast iron block kit designed for a 3-1/2 inch rear axle. Blocks are tapered for correct pinion angle with an offset steel pin and hole to restore axle position, reducing axle wrap for a more controlled and stable feel. Paired with NX2 Nitro Series shocks featuring a nitrogen-charged twin-tube design, 10-stage velocity-sensitive valving, a 1-3/8-inch high-flow piston, and dual-welded ends for increased strength.

Overview

BDS Suspension engineered this 6-inch lift kit with long arm conversion for the 2008 Dodge Ram 2500 and 3500 4WD diesel truck. The kit is designed to improve stance, performance, and capability, providing clearance for up to 37-inch tires. The long lower control arms are built to reduce caster change through wheel travel, creating a more controlled steering feel. The long arm system retains the factory triangulation of the arms, adding to the overall stability of the suspension.

Up front, the kit includes diesel-specific Pro-Ride coil springs, all four control arms plus mounting bracket, a forged drop pitman arm, track bar bracket for steering correction, bump stops, sway bar links, and precision-tuned shocks. In the rear, the kit utilizes heavy duty cast steel blocks or leaf springs (depending on selected option), 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 are included to provide the correct lift height and a smooth, predictable ride across various terrains. Manufactured from high tensile steel as direct OE replacements, these springs are engineered with a properly sized wire diameter to deliver maximum reliability without premature coil bind.

Steering Correction

A forged drop pitman arm minimizes the steering angle once the vehicle is lifted. It is paired with a heavy duty track bar drop bracket to keep steering components in phase through suspension travel while recentering the front axle.

Features

• Tubular long arms reduce caster change and create a more controlled feel on and off road
• Heavy duty control arm brackets maintain proper suspension geometry
• Front high-strength progressive rate Pro-Ride coil springs
• Front track bar relocation bracket to re-position axle
• Forged drop pitman arm to correct steering angles
• Front sway bar correction to maintain handling performance
• Choice of NX2 Nitro Series or FOX 2.0 Performance Series shocks
• Provides clearance for up to 37-inch tires

Specifications

• Lift Height: 6 inches
• System Type: Long arm conversion
• Vehicle Fitment: 2008 Dodge Ram 2500/3500 4WD Diesel
• Pro-Ride coil springs: High tensile steel, diesel-specific, progressive rate, full-length
• Rear block option: Cast iron, tapered for correct pinion angle, offset steel pin to restore axle position
• Rear leaf spring option: Multi-leaf progressive design, maintains factory payload weight ratings
• Rear axle options: 3-1/2 inch or 4 inch diameter
• NX2 Nitro Series shocks: Nitrogen-charged twin-tube, 10-stage velocity-sensitive valving, 1-3/8-inch high-flow piston, dual-welded ends, self-lubricating seals, silver powder coat finish
• FOX 2.0 Performance Series shocks: 2-inch impact extruded aluminum IFP monotube body, CNC machined 6061-T6 aluminum mounting ends, 5/8-inch hard chrome plated heat-treated alloy steel shaft, race-developed high-flow piston, application-specific valving, clear anodized finish

Installation

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

Important Notes

• Measure rear axle tube before ordering. Some 4-inch axle models with dual overloads will require u-bolt 4068.
• Although unusual, if driveline vibration occurs, order the appropriate transfer case drop kit: 122602 (03–05 Diesel Auto), 122605 (06–08 Diesel Auto), or 122606 (03–13 Diesel Auto with OE mount P/N 52121938AA) available in options or t-case index kit #122801 (auto) or #122802 (manual transmission).
• Optional transfer case drop kits fit automatic transmission models only.
• Exhaust modification will be required for dual rear shock kit 122009 on 6.7L Diesel models.
• If your truck has had the steering gear box changed and the sector shaft diameter measures approximately 1-1/2″–1-5/8″, you will need to add part # BDS082404 to your kit.