ICON Vehicle Dynamics Stage 4 Suspension System for 2007-2018 Jeep JK Wrangler 3" Lift

The ICON Vehicle Dynamics Stage 4 Suspension System gives 2007–2018 Jeep JK Wrangler owners a 3-inch lift with front and rear dual-rate coil springs, 2.5 Aluminum Series reservoir shocks, and adjustable track bars at both axles, adding 30% more wheel travel over stock while keeping the vehicle level and the axles centered. The system ships as seven component kits and fits both 2-door and 4-door JK models, with application notes that apply to 2012-and-later builds.

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.

Dual-Rate Springs Built for On- and Off-Road Use

The front 3-inch and rear 2-inch dual-rate progressive-wound coil springs use a softer initial rate for on-road comfort and a firmer secondary rate that engages under compression to resist bottoming out on rough terrain. ICON backs these springs with a lifetime guarantee against sagging, so the lift height is not a one-season proposition. The rear spring kit provides 2 inches of lift independently, which is why 2-door models sit marginally higher than 4-door models. Both remain level when the full system is installed.

2.5 Aluminum Series Reservoir Shocks Front and Rear

The front pair (27820P) are remote-reservoir units; the rear pair (27725P) are piggyback-reservoir units. Both use one-piece impact-extruded aluminum cylinders, which are lighter and more corrosion-resistant than traditional plated steel. The reservoir design extends consistent damping over longer, more demanding runs by keeping fluid cooler during heavy use. All four shocks are fully rebuildable and revalvable, so performance can be restored or tuned without replacing the entire unit.

Adjustable Track Bars for Centered Axle Positioning

Stage 4 adds front and rear adjustable track bar kits (21020 and 21025) that the Stage 3 system omits. Each bar uses a dual-stage bushing system and a JM12T rod end to minimize deflection while maximizing steering responsiveness. After installation, both axles can be dialed in to sit precisely centered under the chassis, a meaningful advantage over fixed track bars, which often leave the axle offset after a lift is installed.

Features

• Dual-rate coil springs front and rear: progressive-wound design with softer initial rate and firmer compression rate
• 30% more wheel travel over stock: combined result of ICON dual-rate coils and 2.5 Aluminum Series shocks
• 2.5 Aluminum Series reservoir shocks: rebuildable and revalvable; remote reservoir front, piggyback rear
• Adjustable track bars front and rear: dual-stage bushing system with JM12T rod end for optimized axle centering
• Tire clearance: fits 33-inch tires with OEM fenders; 35-inch tires fit with aftermarket high-clearance fenders (test fitment recommended)
• Lifetime spring sag guarantee: coil springs covered against sagging for the life of the product

Specifications

Who This Is For and Isn't

This system suits 2007–2018 Jeep JK Wrangler owners (2-door or 4-door) who want a 3-inch lift with reservoir shocks and adjustable track bars for rock crawling, high-speed trail use, or daily driving on and off pavement. It is compatible with OEM wheels and tires at installation.

This system does not fit any Jeep model outside the 2007–2018 JK Wrangler generation. Owners of 2012-and-later JK models must also purchase the ICON exhaust extension spacer (part 22011) or an aftermarket driveshaft (part 22014); neither is included. A rear alignment cam kit may be required after installation and is not included. Tires larger than 33 inches require aftermarket high-clearance fenders and test fitment before committing.

Common Questions

Does this system fit both 2-door and 4-door JK Wranglers?

The ICON Stage 4 system fits both 2-door and 4-door 2007–2018 Jeep JK Wranglers. Two-door models will sit marginally higher than four-door models due to differences in vehicle weight, but both configurations remain level when the full system is installed as designed.

What additional parts are required for 2012-and-later JK models?

On 2012–2018 JK Wranglers, the Stage 4 system requires either the ICON exhaust extension spacer (part 22011) or an aftermarket driveshaft (part 22014); one of those two must be purchased separately. Neither is included in the K22004 kit. A rear alignment cam kit may also be needed after installation.

What tire sizes will fit after installing this lift?

The ICON Stage 4 system clears 33 x 11.50-inch tires with stock OEM fenders. A 35-inch tire will fit with aftermarket high-clearance fenders installed, but ICON recommends test fitment before committing to that tire size. Running 35s without fender modifications is not supported.

Are the shocks rebuildable, and what series are they?

All four shocks in the Stage 4 system are ICON 2.5 Aluminum Series units: remote-reservoir in front, piggyback-reservoir in rear. All four are fully rebuildable and revalvable. The one-piece impact-extruded aluminum cylinders are lighter and more corrosion-resistant than plated steel alternatives.

Why does the Stage 4 system include adjustable track bars when lower stages do not?

A 3-inch lift shifts axle position relative to the chassis, and fixed track bars cannot correct for that offset. The Stage 4 system includes front and rear adjustable track bar kits so both axles can be precisely centered after installation. Each bar uses a dual-stage bushing system and a JM12T rod end to reduce deflection and improve steering response.