4 Inch Lift Kit w/ Radius Arm | Ram 3500 w/ Rear Air Ride (13-18) 4WD | Gas

Built for RAM 3500 owners who need a serious 4-inch lift without sacrificing ride quality or steering geometry, this radius arm kit from BDS Suspension transforms your 2013–2018 gas-powered truck while preserving factory driveline angles. Gain up to 37-inch tire clearance, aggressive stance, and the geometry corrections that keep your truck driving true after the lift goes in.

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 Coil Springs — gas-specific, progressive-rate design tuned for your truck's weight and engine, delivering predictable ride quality across all terrains.
• HD Tubular Radius Arms — heavy-duty replacements for factory stamped steel, mounted in stock locations with built-in caster adjustment and quiet OE-style rubber bushings.
• Forged Drop Pitman Arm & Track Bar Bracket — precision steering geometry correction that keeps your front axle centered and steering responsive through full suspension travel.
• Bump Stops & Brake Line Brackets — complete hardware package for safe, rattle-free installation.

Out back

The rear uses a high-strength fabricated lift block paired with a heavy-duty air bag spacer, longer u-bolts, and matching performance shocks to handle the new ride height and keep your air suspension functioning flawlessly.

Pick your shocks

• BDS NX2 Nitro Series — nitrogen-charged comfort and control for daily driving and light off-road use; the proven workhorse choice.
• FOX 2.0 Performance Series — premium damping with external adjusters for fine-tuned ride feel and serious trail capability.

Important notes

• Maximum tire size: 37 x 12.5 inches.
• This kit is engineered for gas engines only — rear air ride equipped 3500s.
• Caster correction is built into the radius arms and steering hardware to maintain proper geometry after the lift.
• Factory bump stops are included; ensure installation follows BDS specifications for suspension clearance.

Why customers pick this at Road Runner

• BDS radius arm kits are designed and tested locally — we install them every week and know the geometry inside out.
• Caster and steering angles are corrected from day one; no guesswork, no comebacks.
• We handle air suspension spacers and u-bolt sizing correctly the first time.
• Full BDS warranty backed by our shop — if something goes wrong, we fix it.
• Mount and balance available on most kits means you're rolling on your new height by end of business.

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