4 Inch Lift Kit w/ 4-Link | Ram 2500 w/ Rear Air Ride (14-18) 4WD | Diesel

Built for diesel Ram 2500 owners who demand 35-inch tires and rock-solid geometry after the lift, this 4-inch kit converts your factory air-ride suspension into a geometry-corrected 4-Link system that handles like it was engineered for height — because it was. BDS pairs diesel-specific Pro-Ride coil springs with forged steering correction and a complete rear conversion to keep caster, comb angle, and sensor function dialed in at your new ride height.

Installed and serviced at Road Runner Wheels & Tires. Most kits go in the same day. Call (678) 400-6467 to schedule.

What you get up front

• Pro-Ride Diesel Coil Springs — full-length, progressive-rate springs engineered for the weight and torque of your 6.7L, sized to prevent premature bind while delivering the full 4-inch lift.
• 4-Link Control Arm Conversion — high-strength 1/4-inch steel brackets bolt the factory radius arms to new upper and lower control arms, correcting axle geometry and limiting caster change throughout travel.
• Forged Drop Pitman Arm & Track Bar Bracket — steering correction hardware that keeps your front axle centered and steering angle minimized as the suspension cycles.
• Bump Stop Extensions & Brake Line Brackets — complete package to protect components and maintain clearance at full travel.

Out back

Heavy-duty air bag spacers raise the rear 3–5 inches and work with new leveling sensor brackets that reposition your factory ride-height sensors — so the air suspension keeps its full range of motion and behaves exactly as designed at your new height. A track bar relocation bracket corrects rear axle positioning, and sway bar links maintain suspension geometry throughout travel.

Pick your shocks

• BDS NX2 Nitro Series — nitrogen-charged comfort and control for daily driving and moderate trail work; tuned specifically for this 4-inch platform.
• FOX 2.0 Performance Series — external reservoir dampers with velocity-sensitive valving for aggressive off-road duty and high-speed stability on rock and sand.

Important notes

• Maximum tire size: 35 x 12.5 inches.
• This kit is engineered for Ram 2500 diesel models 2014–2018 with factory rear air ride suspension. Confirm your trim and driveline before ordering.
• New air ride leveling sensor brackets are included and must be installed to maintain full air bag function and ride height calibration at your new lift height.
• Rear lift height ranges from 3 to 5 inches depending on load and air bag pressure; front lift is a fixed 4 inches via coil spring.

Why customers pick this at Road Runner

• Geometry corrected for the lift — forged drop pitman arm, track bar relocation, and 4-Link conversion keep your Ram pointing straight and handling predictably.
• Diesel-rated springs and hardware engineered for the weight, torque, and duty cycle of the 6.7L Cummins.
• BDS warranty backed locally — if anything fails, we handle it on-site without shipping delays.
• Installed by technicians who bolt these kits on every week; we know the tight spots and the right torque specs.
• Same-day turnaround on most installs — drive home lifted the day you call.

Ready to build it? Call (678) 400-6467. Hablamos Español.