BDS 3-Inch Radius Arm Lift Kit for 2014–2018 and 2025 Ram 2500 4WD Diesel

BDS lift kit Ram 2500 diesel | McClain Auto Part

Product Highlights

Lifting a diesel-powered Ram 2500 4WD is a different engineering challenge from lifting a gas-powered light-duty truck. The Cummins diesel engine is significantly heavier than a gas engine. That weight difference affects front spring rates, radius arm geometry, and track bar loads in ways that a generic lift kit designed around a gas application does not address correctly. BDS Suspension builds this 3-inch radius arm lift kit specifically for the diesel Ram 2500 4WD. Diesel-specific Pro-Ride coil springs, heavy-duty radius arms, and a high-strength adjustable track bar all reflect the engineering requirements of lifting a truck with a diesel engine rather than adapting gas-application hardware to a heavier platform.

Three inches of lift on a Ram 2500 diesel is a practical choice for owners who want improved stance and 35-inch tire clearance without the driveline complications that larger lift heights introduce on a truck used for towing and hauling. The radius arm design allows caster adjustment across a range of lift heights. That adjustability matters on a work truck where getting geometry right after the lift is as important as the lift height itself. At McClain Auto Part, we carry this BDS kit because it addresses the specific engineering requirements of the diesel Ram 2500 platform rather than treating every truck as the same application.

This kit fits 2014 through 2018 Ram 2500 4WD diesel trucks and the 2025 Ram 2500 4WD diesel. It does not fit gas-powered Ram 2500 trucks or two-wheel drive applications. Confirm your engine and drivetrain before ordering.

What Is Included

BDS engineered this as a complete front and rear suspension system for the diesel Ram 2500 4WD. Every component addresses a specific geometry or structural requirement at the new ride height.

Front Suspension Components

Diesel-specific Pro-Ride coil springs are the most important engineering distinction in this kit compared to gas-application Ram 2500 lift kits. The Cummins diesel adds significant weight over the front axle compared to a gas engine in the same truck. A coil spring designed for a gas Ram 2500 produces incorrect ride height and ride quality under the additional diesel engine weight. BDS supplies progressive rate Pro-Ride coil springs manufactured from high-tensile steel with wire diameter specifically sized for the diesel application. Progressive rate construction delivers appropriate spring rates under light loads for ride comfort and higher rates under heavier loads for stability. The result is correct lift height, correct ride quality, and no risk of premature coil bind from an undersized spring.

Heavy-duty tubular radius arms replace the factory stamped steel units with high-strength tubular steel construction. The factory stamped steel radius arms are adequate for the factory ride height but they represent a strength and geometry limitation at lifted heights. The BDS tubular arms mount into the factory location for straightforward installation. Caster adjustment is built into the design to allow proper geometry correction across a range of lift heights rather than locking the installer into a single fixed caster setting. An OE-style rubber bushing at the frame mount provides smooth, quiet operation without the harshness and noise that polyurethane bushings produce on a daily-driven work truck.

High-strength adjustable track bar built from 1-3/8-inch solid steel maintains front axle centering at the new ride height. The front axle shifts laterally from its centered position when the suspension is raised on a solid front axle truck. This axle shift creates uneven tire wear and affects steering feel and handling at highway speeds. The BDS adjustable track bar allows the installer to re-center the front axle precisely at the specific lift height achieved rather than approximating center with a fixed-length replacement. The track bar arrives pre-assembled with bushings ready to bolt into the factory mounting points.

Forged drop pitman arm corrects steering angles at the new ride height. The pitman arm connects the steering gear output to the drag link that drives the front axle steering. At three inches of lift the factory pitman arm geometry produces a drag link angle that causes bump steer and degrades steering feel. The BDS drop pitman arm restores the correct drag link angle at the new height and eliminates this geometry problem.

Sway bar links correct sway bar geometry at the new front ride height. Factory sway bar link length becomes incorrect at three inches of lift. The BDS links restore proper sway bar operating geometry throughout the suspension travel range.

Brake line brackets maintain proper brake line routing and positioning at the new ride height. Factory brake line brackets position the lines at the stock height. Lifting the truck without addressing bracket positioning can cause brake line stress and chafing over time.

Rear Suspension Components

High-strength fabricated coil spacer achieves the rear lift height with a purpose-built unit rather than simple rubber or foam spacers. The coil spacer maintains proper spring seating geometry and load transfer characteristics at the new rear height.

Track bar relocation bracket corrects rear axle positioning at the new rear ride height. The same lateral axle shift that the front track bar addresses in the front of the truck occurs at the rear as well on a lifted Ram 2500. The rear track bar relocation bracket re-centers the rear axle at the new height and restores proper rear axle positioning.

Bump stop extensions prevent suspension over-travel at the new rear ride height. They protect rear suspension components from bottoming during hard use on the trail or under heavy loads.

Shock Options

Three shock options are available for this kit. Each delivers a different performance profile and price point. Select based on how the truck is used daily rather than defaulting to the highest-specification option without considering the application.

BDS NX2 Nitro Series

The NX2 is the practical choice for Ram 2500 owners who use their truck primarily for towing, hauling, and daily driving with occasional trail or off-road use.

Nitrogen charging and a twin-tube design with 10-stage velocity-sensitive valving deliver consistent damping performance across the conditions a work truck encounters regularly. The velocity-sensitive valving produces controlled damping over sharp road impacts and appropriate resistance through longer suspension events. The 1-3/8-inch high-flow piston moves fluid efficiently through the valve stack. Dual-welded mounting ends add structural strength at the highest-stress points of the shock body. Self-lubricating seals reduce maintenance requirements over a long service life. Silver powder coat finish resists undercarriage corrosion in the conditions a work truck operates in year-round.

FOX 2.0 Performance Series IFP

The FOX 2.0 IFP suits Ram 2500 owners who use their truck in more demanding off-road conditions and want damping performance that matches the application.

The monotube internal floating piston design runs cooler under sustained off-road use than twin-tube alternatives. The two-inch impact-extruded aluminum body dissipates heat more effectively during extended off-road sessions. The 5/8-inch hard chrome-plated heat-treated alloy steel shaft resists bending under lateral loads during off-road articulation. CNC machined 6061-T6 aluminum mounting ends reduce weight while maintaining structural integrity. Application-specific valving developed for this specific Ram 2500 diesel lift application ensures the FOX 2.0 is tuned for the spring rates and geometry of this kit rather than a generic performance tune. Clear anodized finish resists corrosion and UV degradation in the undercarriage environment.

FOX 2.5 Performance Elite Series

The FOX 2.5 Performance Elite is the top-specification shock option for Ram 2500 owners who demand maximum off-road capability and want adjustable damping control to match varying terrain, load, and speed conditions.

The 2.5-inch impact-extruded aluminum body is larger than the 2.0 body and delivers increased oil volume for better heat management during sustained high-speed off-road use. The external reservoir separates shock oil from the high-pressure nitrogen charge. This separation prevents aeration of the shock oil during hard use and maintains consistent damping performance across extended off-road sessions where lesser shocks fade as the oil heats up.

The 7/8-inch hard chrome-plated heat-treated alloy steel shaft is larger than the 5/8-inch shaft in the FOX 2.0. The larger shaft diameter provides significantly more resistance to bending under the lateral loads that occur during aggressive articulation on a heavy diesel truck. The DSC dual speed compression adjuster comes standard. This adjuster allows the driver to tune low-speed compression damping for terrain, load, and speed conditions without tools. The FOX 2.5 Performance Elite is fully serviceable for a lifetime of use rather than a replace-when-worn shock. FOX backs this shock with a one-year manufacturer warranty.

For Ram 2500 diesel owners who use their truck in serious off-road applications, run heavy loads regularly, or simply want the best performing shock option available for this application, the FOX 2.5 Performance Elite is the correct choice.

Recommended Tire and Wheel Combinations

This kit opens up fitment for tires up to 35 inches on the 2014 through 2018 and 2025 Ram 2500 diesel 4WD. BDS recommends the following combinations based on application testing. Trimming may be required.

Backspace directly affects inner fender clearance and outer fender line position at full steering lock and full suspension compression. The combinations above work with this specific BDS kit on the Ram 2500 diesel application. Deviating from these backspace specifications increases the risk of tire contact at the inner fender or steering components during full articulation.

Factory Protection Plus Drivetrain Warranty

BDS includes their Factory Protection Plus drivetrain warranty with this kit. This coverage protects Ram 2500 drivetrain components against warranty complications that a lift kit installation might otherwise create. For Ram 2500 trucks still within their factory powertrain warranty window, this inclusion provides meaningful protection. Most lift kit manufacturers do not offer this coverage.

Why McClain Auto Part Carries This Ram 2500 Suspension Kit

We have supplied Ram truck owners from Cleveland since 2009. The products we carry reflect what we would put on our own trucks. BDS earns a place in our inventory on the Ram 2500 diesel platform because they build diesel-specific lift kits rather than adapting gas-application hardware to a heavier truck. The diesel-specific Pro-Ride springs, tubular radius arms, adjustable track bar, and forged pitman arm in this kit reflect the engineering requirements of lifting a Cummins-powered Ram 2500 correctly. For owners of 2014 through 2018 and 2025 Ram 2500 diesel trucks who want a three-inch lift that drives well, tows properly, and holds up to work truck use, this is the kit we recommend.

Before You Order

Confirm your model year as 2014 through 2018 or 2025, confirm your drivetrain as 4WD, and confirm your engine as diesel before ordering. Select your shock option based on how the truck is used. NX2 Nitro Series for daily driving and moderate trail use. FOX 2.0 Performance Series for more demanding off-road use. FOX 2.5 Performance Elite for maximum off-road capability and adjustable damping control.

Contact our Cleveland team with your year, drivetrain, engine, and shock preference. We confirm compatibility and current pricing before anything ships.

McClain Auto Part. Cleveland, Ohio. Ram truck parts and suspension components shipped nationwide. In business since 2009.