ICON Stage 3 Suspension System for 2014-2026 Ram 2500 4WD Diesel OEM Air Spring Rear 4.5" Lift

The ICON Vehicle Dynamics Stage 3 Suspension System is a complete 4.5-inch front lift kit engineered specifically for 2014–2026 Ram 2500 4WD trucks running diesel engines and factory rear air suspension. The system pairs vehicle-tuned 2.5 Aluminum Series remote-reservoir shocks front and rear with ICON-engineered dual-rate coil springs, adjustable track bars, radius arm drop brackets, rear air bag spacers, and all installation hardware. Ram 2500 Rebel models receive 2.5 inches of front lift rather than 4.5 inches.

Shipping: ICON parts ship direct from ICON Vehicle Dynamics, mostly by UPS Ground. Lead times vary by part and some items are built to order, so please allow extra time. We email tracking as soon as your order ships.

Balanced Performance Front to Rear

Every shock absorber in this Stage 3 system is a vehicle-specific 2.5 Aluminum Series unit equipped with CDC (Compression Damping Control) Valve technology, giving the driver ten distinct compression damping settings adjustable with a single knob. That range lets the same truck ride comfortably on the highway, handle a loaded trailer without wallowing, and absorb rough off-road terrain without swapping components. Front shocks are remote-reservoir units. Rear shocks are piggyback units. Both are fully serviceable.

Geometry Corrected, Towing Capacity Unchanged

Precision CNC laser-cut radius arm drop brackets correct suspension geometry at the new ride height, while front and rear adjustable track bars realign both axles and add structural strength. PTFE-lined spherical bearings in the track bar ends eliminate the bushing deflection that causes vague steering feel after a lift. ICON states that increased wheel travel and suspension performance are achieved with no reduction in towing capacity.

Factory Rear Air Ride Retained

Fabricated rear air bag spacers and revised sensor linkages allow the factory rear air suspension to remain fully functional while delivering 3.75 inches of rear lift over stock, producing a level stance front to rear. Rear ride height remains adjustable through the factory air system. This design is specific to Ram 2500 models equipped with the OEM rear air suspension option; it does not apply to trucks with conventional rear springs.

Features

• Dual-rate front coil springs: ICON-engineered for 4.5" front lift with progressive spring rate for varying load and terrain
• 2.5 Aluminum Series shocks, front and rear: vehicle-specific tuning, remote-reservoir front and piggyback rear, fully serviceable
• CDC Valve technology: 10-position compression damping adjustment on all four shocks via external knob
• Adjustable front and rear track bars: PTFE-lined spherical bearings, realign axles and improve handling geometry at lift height
• Rear air bag spacers and sensor linkages: retain OEM rear air suspension function and provide 3.75" of rear lift
• Radius arm drop brackets: CNC laser-cut, correct suspension geometry at the lifted height

Specifications

Who This Is For and Isn't

This system suits 2014–2026 Ram 2500 4WD owners running diesel engines who want a 4.5-inch front lift with corrected geometry, tunable damping, and retained factory rear air ride, whether the truck sees daily driving, towing, or off-road use.

This system does not fit Ram 2500 gas engine models, 2WD models, or any Ram 2500 not equipped with the factory rear air suspension option. Ram 2500 Rebel owners should note the front lift is 2.5 inches, not 4.5 inches. 2019–2026 model-year trucks require an aftermarket high-angle front driveshaft (ICON part 212511 or 212512, sold separately) to prevent driveline bind. Trucks with two-piece driveshafts require a carrier shim kit (ICON part 214211, sold separately). ADAS recalibration is required after installation.

Common Questions

Does this system work with the factory rear air suspension, or does it replace it?

The ICON Stage 3 system retains the factory rear air suspension. Fabricated air bag spacers and revised sensor linkages allow the OEM air springs to remain in place and function normally, while adding 3.75 inches of rear lift over stock. Rear ride height remains adjustable through the factory air system. The system requires that the truck already be equipped with the OEM rear air suspension option.

What is CDC Valve technology and how is it adjusted?

CDC stands for Compression Damping Control. Each of the four shocks in this Stage 3 system includes a CDC Valve that provides ten distinct compression damping settings, ranging from soft to firm. Adjustment is made by turning an external knob on the shock body, with no need to remove the shock from the vehicle.

Will this system fit a Ram 2500 with a gas engine?

No. The ICON Stage 3 system K214523A is rated for diesel engines only. The dual-rate front coil springs are specifically engineered for the heavier front-end weight of a diesel-powered Ram 2500. A separate ICON system is required for gas-engine Ram 2500 models.

Do 2019–2026 Ram 2500 trucks need any additional parts?

Yes. 2019–2026 Ram 2500 and 3500 models require an aftermarket high-angle front driveshaft to prevent driveline bind after installation of this system. ICON recommends part numbers 212511 or 212512, both sold separately. Trucks equipped with a two-piece driveshaft also require a carrier shim kit (ICON part 214211, sold separately). ADAS recalibration is required on all model years after installation.

What tire and wheel sizes fit after installing this system?

This Stage 3 system accommodates tires up to 37 inches in diameter on OEM wheels and tires without modification. Larger tires may fit but will require fender trimming and other modifications. ICON recommends aftermarket wheels in 17x8.5-inch, 18x9-inch, or 20x9-inch sizes with specific backspacing and offset figures available in the specifications section above.