BDS 6 Inch Long Arm & FOX 2.5 Coilover Lift Kit | 2003-2007 Dodge Ram 2500/3500 4WD Diesel | w/ Rear Block Kit

This configuration includes a rear block kit featuring cast iron blocks tapered for correct pinion angle. The steel pin and hole are offset to restore axle position, reducing axle wrap for a more controlled and stable feel.

Overview

This 6-inch lift kit with long-arm and FOX 2.5 coilover conversion is designed for 2003–2007 Dodge RAM 2500 and 3500 4WD diesel trucks. The kit improves stance, performance, and capability, providing clearance for up to 37-inch tires. BDS developed a mounting system that bolts directly to the factory coil mounts with only minor trimming and drilling required. Weld-in reinforcements at the axle are included for superior strength. The long lower control arms are built to reduce caster change with wheel travel, creating a more controlled steering feel while retaining the factory triangulation of the arms for added suspension stability.

Up front, the kit includes FOX 2.5 coilover shocks, all four control arms, mounting brackets, a forged drop pitman arm, a track bar bracket for steering correction, bump stops, and sway bar links. In the rear, the kit utilizes heavy-duty cast-steel blocks or leaf springs (depending on variant), longer u-bolts, and a matched set of FOX 2.0 Performance shocks.

Features

• FOX 2.5 Factory Series coilovers offer improved damper performance over stock, with a remote reservoir for additional fluid capacity
• 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 coil springs for improved ride quality on any terrain
• Front track bar relocation bracket to re-position the axle
• Forged drop pitman arm to correct steering angles
• Front sway bar correction links to maintain handling performance
• Rear FOX 2.0 Performance Series IFP gas shocks to improve ride and off-road performance
• Long arm system retains factory triangulation for added suspension stability
• Provides clearance for up to 37-inch tires

Specifications

• Lift Height: 6 inches
• Vehicle Fitment: 2003–2007 Dodge RAM 2500/3500 4WD Diesel
• FOX 2.5 coilover diameter: 2.5 inches
• Long arm lower control arm wall: heavy-wall tubular construction
• Long arm frame brackets: 1/4-inch steel, frame-mounted
• Bushings: oversized greaseable polyurethane
• Rear shocks: FOX 2.0 Performance Series IFP gas shocks

Installation

• Estimated Time: 6–8 hours
• Difficulty: Moderate
• Tools Required: Cut Off Wheel or equivalent, Grinder/Sanding Disc, 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.