ICON 2005+ Ford F-250/350 SD 4WD 2.5-3in 3.0 Series VS RR CDCV Bolt-In Coilover Conversion Kit

Trade the Factory Coil and Shock for 3.0 Series Performance: ICON's Bolt-In Conversion for the 2005-Plus F-250 and F-350 Super Duty

The ICON ICO61800C is a front bolt-in coilover conversion kit engineered for 4WD Ford F-250 and F-350 Super Duty trucks built from 2005 and up. It replaces the factory independent coil spring and shock setup with a pair of 3.0 Series Vehicle Specific Remote Reservoir coilovers featuring ICON's CDCV compression damping control technology.

The result is a 2.5 to 3.0 inch front lift over stock with significantly improved damping control, driver-adjustable compression tuning, and a fully rebuildable shock body rated to withstand the rigors of towing, hauling, and off-road use that Super Duty owners demand. The ICO61800C is engineered to bolt into the factory coil bucket location after removing the OEM coil centering cup, making it a clean, non-destructive upgrade for trucks that see both on-road duty and rough terrain.

Key Features

• ICO61800C installs as a pair of 3.0 Series Vehicle Specific Remote Reservoir front coilovers, replacing the factory independent coil and shock assembly on 2005-and-later Ford F-250 and F-350 Super Duty 4WD trucks with a single rear wheel axle
• CDCV (Compression Damping Control Valve) technology delivers 10 externally adjustable compression damping settings, allowing the driver to tune from soft to firm without removing the shock or disassembling the suspension
• 3.0 inch shock body provides greater oil volume, improved heat dissipation, and a multi-stage hydraulic Bump Zone that exponentially increases bottom-out resistance in the final 40 percent of compression travel
• Provides 2.5 to 3.0 inches of front lift over stock height on a stock-equipped Super Duty, with ride height adjustable via the threaded coilover body
• ICON Vehicle Specific (V.S.) valving is custom-tuned for the F-250/F-350 Super Duty platform, accounting for vehicle weight, spring rate, and the suspension geometry specific to this axle configuration
• Eibach coil springs are included and covered by a lifetime warranty against sagging and breakage
• FK Rod End spherical bearings replace rubber bushings at the mounting points, providing a precise, low-deflection connection that extends service life compared to OEM rubber components
• 1 inch CNC machined, induction hardened, chrome plated shock shaft resists bending and corrosion under repeated heavy load cycles
• Fully rebuildable and revalveable shock body allows for service by authorized ICON service centers rather than replacement when shocks reach end of service life
• Remote reservoir design with external finned aluminum reservoir improves heat dissipation under sustained compression cycles typical of towing, off-pavement driving, or construction site terrain
• Springs in this kit are rated for diesel engine applications; compatible with 4WD models only; single rear wheel models only; not compatible with F-350 Cab and Chassis
• Removal of the coil centering cup in the factory coil bucket is required before installation; no cutting or welding is required
• Fits OEM wheels and tires without modification; recommended aftermarket tires up to 35 x 12.50

Vehicle Fitment

Specifications

What's Included

• 2x ICON 3.0 Series VS Remote Reservoir CDCV front coilovers (driver and passenger)
• 2x Eibach coil springs (vehicle-specific rate, lifetime warranty)
• 2x External finned aluminum remote reservoirs
• Reservoir mounting hardware
• FK Rod End spherical bearings at applicable mounting points
• Coilover hardware kit
• ICON installation instructions

About ICON Vehicle Dynamics

ICON Vehicle Dynamics designs and manufactures performance suspension components in Corona, California. The company's engineering team develops vehicle-specific solutions for popular truck and SUV platforms, with a focus on measurable improvements in both on-road ride quality and off-road capability. Each ICON shock is built with rebuildable construction and is covered by ICON's warranty program, which provides lifetime coverage on non-wearable components, springs, and weldments, and 12 months of defect coverage on shock absorbers. ICON uses its own ICON 1K validation process, which includes extensive real-world testing under demanding off-road conditions, to confirm tune, durability, and performance before products reach customers.

FAQ

What is the difference between the ICON ICO61800C 3.0 Series and the ICO61720C 2.5 Series coilover kit for the F-250/F-350?

The ICO61800C uses a 3.0 inch diameter shock body versus the 2.5 inch body found in the ICO61720C. The larger body diameter means greater internal oil volume, which improves heat management under sustained or repeated compression cycles common in heavy-duty applications like towing or sustained off-road use. The 3.0 Series also features a 1 inch shock shaft compared to the 7/8 inch shaft in the 2.5 Series, adding rigidity under heavy loads. Both kits share bolt-in fitment in the factory coil bucket and CDCV adjustability, but the 3.0 Series is the higher-output option for drivers who push their Super Duty harder or run the truck at heavier GVW on a regular basis.

Does the ICON ICO61800C fit both diesel and gas F-250/F-350 Super Duty trucks?

The coil springs included with the ICO61800C are rated for diesel engine applications. The additional weight of the diesel engine over gas variants is accounted for in the spring rate selection. If your truck has a gas engine, the spring rate may not be optimally suited for the lower front end weight, which can affect ride height and ride quality. Contact ICON tech support at (951) 689-4266 before purchasing if your Super Duty is gas-powered to confirm which spring option is correct for your application.

Will the ICO61800C fit my F-350 Cab and Chassis or DRW (Dual Rear Wheel) model?

No. The ICON ICO61800C is not compatible with F-350 Cab and Chassis configurations. It is also designed for Single Rear Wheel (SRW) models only. Dual rear wheel variants and Cab and Chassis work trucks have different suspension geometry and load ratings that are not accounted for in this kit. Only 4WD SRW F-250 and F-350 Super Duty pickups with standard cab configurations are supported.

How many inches of front lift does the ICO61800C provide?

The ICON ICO61800C provides between 2.5 and 3.0 inches of front lift over stock on a stock-equipped vehicle running factory ride height. Actual lift achieved depends on where the coilover ride height adjuster is set and the base ride height of the specific truck. These heights are indicated for a stock-equipped vehicle at factory ride height. Modifications that change the front end weight, such as aftermarket bumpers, winches, or auxiliary lighting, can affect the resulting ride height and may shift the effective lift range.

Is a track bar adjustment required after installing the ICON ICO61800C on a Super Duty?

ICON recommends adding their adjustable track bar bracket (part number 64039) when running between 2.5 and 5.5 inches of front lift to correct bump steer geometry. The ICO61800C falls within this range. The factory track bar is a fixed length and was designed for stock ride height. At lifted heights, the angle of the track bar can cause the front axle to shift laterally during suspension travel, creating a condition commonly referred to as bump steer. An adjustable track bar or bracket corrects this geometry. Contact ICON or an authorized suspension installer to determine which solution is appropriate for your build.

Can I add a secondary shock with the ICO61800C for bypass-style extended travel performance?

Yes. The ICO61800C coilover conversion design allows for the addition of a secondary shock alongside the coilover. ICON offers secondary shock options for this application. Contact ICON tech support directly at (951) 689-4266 for details on compatible secondary shock options, mounting requirements, and whether a bracket kit is needed for your specific truck configuration and intended use.

What is the warranty on the ICON ICO61800C coilover kit?

ICON provides a lifetime warranty on all non-wearable components, springs, and weldments in the ICO61800C kit. The shock absorbers themselves are covered for 12 months from the date of purchase against manufacturer defects. The Eibach coil springs carry a separate lifetime guarantee against sagging or breakage. Labor, alignment, and installation costs are not covered under any ICON warranty. For warranty service, contact ICON directly at (951) 689-4266 or through their website.

Does the ICON ICO61800C require alignment after installation?

Yes. Any suspension modification that changes the front ride height of a vehicle requires a professional alignment to bring caster, camber, and toe back within specification. This is true of the ICO61800C. ICON also recommends their alignment cams (sold separately) to allow additional caster adjustment to achieve proper geometry after the 2.5 to 3.0 inch lift is installed. Driving on an unaligned suspension after a lift install accelerates tire wear and can create unsafe handling characteristics, particularly at highway speeds. Factor alignment cost into the total installation budget.

Will the ICO61800C work with my current OEM F-250 wheels and stock tires?

Yes. The ICON ICO61800C is confirmed compatible with OEM F-250/F-350 wheels and factory tires. Aftermarket tire fitment up to 35 x 12.50 is reported to work on most Super Duty applications running this kit at stock fender clearance. Tires larger than 35 inches may require fender trimming or modifications to prevent contact during full suspension travel or during steering input at full lock. ICON recommends 17x8.5 with 5.00 inch backspace, 18x9 with 5.25 inch backspace, or 20x9 with 5.25 inch backspace in their ICON Alloys line for optimal fitment with this coilover kit.

Installation Instructions

1. Safely lift and support the vehicle on jack stands placed under the frame. Never work under a vehicle supported only by a floor jack.
2. Remove the front wheels and tires to access the suspension components.
3. Disconnect the sway bar end links and any brake line brackets secured to the coil bucket or shock body.
4. Support the front axle with a floor jack to prevent the axle from dropping suddenly when the suspension is disconnected.
5. Remove the factory shock absorber upper mounting bolts and lower through-bolt, then remove the shock from the vehicle.
6. Remove the factory coil spring from the coil bucket. Remove the coil centering cup from the bottom of the factory coil bucket using the appropriate tools. This step is required for bolt-in coilover installation.
7. Install the ICON 3.0 Series CDCV coilover into the factory shock mounting location. Thread the upper mounting hardware and lower eyelet hardware per the ICON instructions, hand-tight only at this stage.
8. Mount the external remote reservoir in the ICON-specified location for the F-250/F-350 application using the provided reservoir brackets and hardware. Route the reservoir hose clear of moving components and heat sources.
9. Set the ride height adjuster ring on the coilover body to achieve the desired lift height (2.5 to 3.0 inches over stock). Preload the spring per ICON's specified procedure.
10. Lower the axle carefully and reconnect the sway bar end links and brake line brackets.
11. Reinstall the wheels and tires. Torque all suspension fasteners to manufacturer specifications with the suspension at ride height (load the suspension by lowering the vehicle to the ground before performing final torque).
12. Set the CDCV compression damping adjuster to the desired setting (1 = softest, 10 = firmest) before driving.
13. Take the vehicle to a professional alignment shop immediately after installation. Caster, camber, and toe must be set to within factory specification or to your aligner's recommendation for the lift height installed.
14. Inspect all mounting fasteners, reservoir hose connections, and reservoir mounting brackets after the first 500 miles of driving and retorque as needed.

WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.