ICON Stage 5 Suspension System with Billet UCA & Remote Reservoir Coilovers – 2003-2009 4Runner & 2007-2009 FJ Cruiser | K53055

Take your Toyota's suspension performance to a higher level with the ICON Vehicle Dynamics Stage 5 Suspension System, part #K53055.

Designed specifically for the 2003-2009 Toyota 4Runner and 2007-2009 Toyota FJ Cruiser, the ICON Stage 5 system combines Extended Travel 2.5 Series Remote Reservoir front coilovers, billet aluminum upper control arms with ICON Delta Joint, 2-inch rear lift coil springs, billet aluminum rear lower links, and 2.5 Aluminum Series Remote Reservoir rear shocks with Bump Zone technology.

Compared with the ICON Stage 4 system, Stage 5 upgrades the front suspension to remote reservoir coilovers, increasing shock oil volume and cooling capacity for improved performance during prolonged or demanding off-road use.

With 2.5 Series remote reservoir shocks front and rear, the Stage 5 system provides more balanced damping capability across the entire vehicle.

Vehicle Fitment

Toyota 4Runner

• 2003

• 2004

• 2005

• 2006

• 2007

• 2008

• 2009

Toyota FJ Cruiser

• 2007

• 2008

• 2009

IMPORTANT: ICON lists the complete K53055 Stage 5 system specifically for 2003-2009 Toyota 4Runner and 2007-2009 Toyota FJ Cruiser applications.

Individual components included in K53055 may fit additional Toyota and Lexus vehicles, but that does not extend the fitment of the complete K53055 suspension system.

Features

• Complete ICON Stage 5 Suspension System

• Fits 2003-2009 Toyota 4Runner

• Fits 2007-2009 Toyota FJ Cruiser

• Adjustable 0-3.5" front lift

• ICON Extended Travel 2.5 Series Remote Reservoir front coilovers

• Increased front droop and wheel travel

• Increased front shock oil volume and cooling

• ICON billet aluminum upper control arms

• ICON patented Delta Joint

• ICON billet aluminum rear lower links

• Rear lower links provide on-vehicle pinion angle adjustment

• 2" rear lift coil springs

• ICON 2.5 Aluminum Series Remote Reservoir rear shocks

• Rear shocks feature ICON Bump Zone technology

• Remote reservoir shocks front and rear

• Improved heat management during prolonged off-road use

• Increased resistance to shock fade

• Vehicle-specific front and rear shock tuning

• Improved suspension articulation

• Increased wheel travel and ride quality over stock

• Improved on-road and off-road handling

• 6061 aircraft-grade CNC-machined aluminum components

• Corrosion-resistant CAD-plated coilover shock bodies

• Heavy-duty 7/8" front shock shafts

• Heavy-duty 7/8" rear shock shafts

• FK Rod End bearings for extended longevity and minimal deflection

• Fully serviceable shocks

• Bolt-on installation

• No cutting or welding required

• ICON Vehicle Dynamics part number K53055

What Does Stage 5 Add Over Stage 4?

The major upgrade from ICON Stage 4 to Stage 5 is the front shock package.

Stage 4 uses Extended Travel 2.5 Series internal-reservoir front coilovers.

Stage 5 upgrades to:

• 2.5 Series Extended Travel front coilovers

• Remote reservoirs

• Increased front shock oil volume

• Enhanced cooling

• Greater resistance to shock fade

• Balanced remote-reservoir damping front and rear

The Stage 5 system retains the major Stage 4 rear components, including the 2.5 Series Remote Reservoir rear shocks with Bump Zone technology, rear 2" lift springs, and billet rear lower links.

For vehicles that regularly encounter demanding off-road terrain, washboard roads, long trail days or repeated suspension cycling, the remote-reservoir front coilovers provide an important increase in thermal capacity.

Adjustable 0-3.5" Front Lift

The ICON Stage 5 front coilovers provide 0 to 3.5 inches of adjustable front lift on a stock-equipped vehicle.

This allows you to adjust front ride height based on your desired stance, tire size and vehicle configuration.

Unlike a basic spacer lift, the ICON system replaces the factory front shock and spring assemblies with performance coilovers designed to improve:

• Ride quality

• Shock damping

• Suspension travel

• Vehicle control

• Off-road performance

• Front ride height

Front Lift Range: 0-3.5"

ICON notes that published coilover lift heights are based on a stock-equipped vehicle. Added weight from bumpers, winches, skid plates and other accessories can affect actual ride height.

Extended Travel 2.5 Remote Reservoir Front Coilovers

The K53055 uses ICON 58745 Extended Travel 2.5 Series Remote Reservoir Coilovers.

The Extended Travel design increases front suspension droop and wheel travel when combined with the included ICON billet upper control arms.

The addition of external reservoirs provides greater shock oil capacity and improved heat management compared with internal-reservoir coilovers.

Key features include:

• 2.5-inch shock body

• Extended Travel design

• External remote reservoirs

• Increased shock oil volume

• Enhanced cooling

• Improved resistance to shock fade

• Vehicle-specific shock tuning

• Adjustable 0-3.5" front lift

• Increased front droop travel

• Corrosion-resistant CAD-plated shock body

• Heavy-duty 7/8-inch shock shaft

• 6061 aircraft-grade aluminum CNC-machined components

• FK Rod End bearings

• Fully serviceable construction

Why Remote Reservoir Front Coilovers?

Shock absorbers convert suspension movement into heat.

During prolonged driving over rough terrain, repeated suspension cycling increases shock temperature. As temperatures rise, damping performance can begin to decrease.

The remote reservoir increases the total fluid capacity of the shock system and provides additional surface area for heat management.

This helps the front suspension maintain more consistent damping during extended demanding use.

The remote reservoir front coilovers are particularly beneficial for:

• Aggressive trail driving

• High-speed off-road use

• Washboard roads

• Overlanding

• Extended backcountry travel

• Heavily modified vehicles

• Repeated rough-terrain driving

ICON Billet Upper Control Arms

The K53055 Stage 5 system includes ICON 58551DJ billet aluminum upper control arms.

These premium UCAs are CNC machined from 6061 aircraft-grade aluminum and are designed to complement the Extended Travel front coilovers.

The upgraded control arms provide the additional articulation required to take advantage of the Extended Travel suspension while helping maintain proper geometry at increased ride heights.

ICON Delta Joint

The billet upper control arms use ICON's patented Delta Joint.

The Delta Joint combines the durability and weather resistance of a ball joint with increased angularity similar to a traditional uniball.

Features include:

• Heavy-duty high-angle design

• Increased angularity compared with a conventional ball joint

• Metal-on-metal construction

• Greaseable design

• Zinc-plated housing for corrosion resistance

• Protective grease seal

• Helps keep dirt, water and contaminants away from internal components

• Designed for quiet operation

• Excellent for daily-driven and off-road vehicles

Billet Aluminum Rear Lower Links

The K53055 system includes ICON 54000 billet aluminum rear lower links.

These links replace the factory rear lower links with significantly stronger CNC-machined aluminum components while also adding suspension adjustment capability.

Benefits include:

• CNC-machined 6061 billet aluminum construction

• Increased strength compared with OE lower links

• On-vehicle pinion angle adjustment

• Improved rear suspension geometry

• Correct roll-steer geometry

• Greaseable dual-stage bushings

• Improved on-road and off-road handling

The ability to adjust the pinion angle is especially useful on lifted vehicles where changes in suspension geometry can affect driveline angles.

Adjustable Rear Pinion Angle

Lifting a vehicle changes the relationship between the rear axle and driveshaft.

ICON's billet rear lower links feature a double-adjuster design that allows fine-tuning of rear pinion angle while installed on the vehicle.

This allows the installer to optimize rear driveline geometry for the vehicle's final suspension height.

2" Rear Lift Coil Springs

The K53055 includes ICON 52700 2-inch rear lift coil springs.

These springs complement the adjustable front suspension and provide additional rear ride height while maintaining balanced front-to-rear suspension performance.

2.5 Aluminum Series Remote Reservoir Rear Shocks

Stage 5 uses ICON 57810P 2.5 Aluminum Series Remote Reservoir rear shocks.

Rear shock features include:

• 2.5-inch aluminum shock body

• External remote reservoirs

• Increased shock oil volume

• Enhanced cooling

• Improved resistance to shock fade

• Vehicle-specific tuning

• Heavy-duty 7/8-inch shock shafts

• Designed for 1-3 inches of rear lift

• ICON Bump Zone technology

• Fully serviceable construction

ICON Bump Zone Technology

The rear shocks included with K53055 feature ICON's Bump Zone technology.

Bump Zone significantly increases damping during the final 2 inches of compression travel.

As the rear suspension approaches full compression, the additional damping helps slow axle movement before the suspension reaches the end of its travel.

This helps:

• Reduce harsh bottom-out

• Improve suspension control

• Absorb larger impacts

• Maintain better vehicle composure

• Provide a more controlled ride over varying terrain

Balanced Remote Reservoir Damping Front & Rear

One of the defining advantages of ICON Stage 5 is the use of 2.5 Series Remote Reservoir shocks at both the front and rear.

This provides more balanced shock capacity across the vehicle, with increased fluid volume and improved heat management at both ends.

For drivers who frequently push their 4Runner or FJ Cruiser off road, this provides a meaningful advantage over lower ICON stages using internal-reservoir front coilovers.

System Components

The ICON K53055 Stage 5 Suspension System includes:

Front Extended Travel Remote Reservoir Coilovers

• ICON 58745

• Quantity: 1 pair

• 2.5 Series Vehicle-Specific Remote Reservoir Coilovers

• Extended Travel

• Adjustable 0-3.5" front lift

Billet Upper Control Arms

• ICON 58551DJ

• Quantity: 1 kit

• CNC-machined billet aluminum

• ICON Delta Joint

Billet Rear Lower Links

• ICON 54000

• Quantity: 1 kit

• CNC-machined billet aluminum

• On-vehicle pinion angle adjustment

Rear Coil Springs

• ICON 52700

• Quantity: 1 pair

• 2" rear lift coil springs

Rear Remote Reservoir Shocks

• ICON 57810P

• Quantity: 1 pair

• 2.5 Aluminum Series

• Remote reservoir

• Vehicle-specific tuning

• Bump Zone technology

• Designed for 1-3" rear lift

Wheel & Tire Recommendations

ICON confirms that OEM wheels and tires are compatible with the K53055 suspension system.

For aftermarket wheel and tire combinations, ICON recommends:

17" Wheels

• 17x8.5"

• 4.75" backspacing

• 0mm offset

18" Wheels

• 18x9"

• 5.00" backspacing

• 0mm offset

20" Wheels

• 20x9"

• 5.00" backspacing

• 0mm offset

Recommended Aftermarket Tire Size:
33" x 11.50"

ICON notes that larger tires may fit, but fender trimming and other modifications will be required.

Actual tire clearance can vary based on wheel width, offset, backspacing, suspension height and vehicle configuration.

Important Remote Reservoir Clearance Note

ICON notes that the remote reservoir mounting brackets may interfere with some aftermarket bumper mounts or windshield washer bottles.

If your vehicle has an aftermarket bumper, washer reservoir relocation or other modifications in the reservoir mounting area, verify clearance before installation.

Expedition Coil Option for Heavier Vehicles

ICON identifies an optional 700 lb/in Expedition Coil for heavier-equipped vehicles.

This may be useful for FJ Cruisers and 4Runners carrying substantial permanent front-end weight from accessories such as:

• Steel bumpers

• Winches

• Skid plates

• Recovery equipment

• Other permanently installed accessories

Fully Serviceable ICON Shocks

The ICON shocks included with K53055 are fully serviceable.

Unlike disposable replacement shocks, ICON shocks can be serviced and rebuilt as components wear, helping extend the usable life of the suspension system.

Bolt-On Installation

The ICON K53055 Stage 5 Suspension System is designed as a bolt-on suspension upgrade.

No cutting or welding is required.

A professional wheel alignment should be performed after installation and final front ride-height adjustment.

Because the system also includes adjustable rear lower links, the rear pinion angle should be properly adjusted during installation.

Product Specifications

Manufacturer: ICON Vehicle Dynamics
Part Number: K53055
Product: Stage 5 Suspension System
Toyota 4Runner Fitment: 2003-2009
Toyota FJ Cruiser Fitment: 2007-2009
Front Shock Series: ICON 2.5 Series Extended Travel
Front Shock Type: Remote Reservoir Coilover
Front Lift Range: 0-3.5"
Upper Control Arms: ICON Billet Aluminum
UCA Joint: ICON Delta Joint
Rear Lower Links: ICON Billet Aluminum
Rear Link Adjustment: On-Vehicle Pinion Angle Adjustment
Rear Coil Spring Lift: 2"
Rear Shock Series: ICON 2.5 Aluminum Series
Rear Shock Type: Remote Reservoir
Rear Shock Technology: ICON Bump Zone
Rear Shock Lift Range: 1-3"
Front Shock Shaft: 7/8"
Rear Shock Shaft: 7/8"
Front Coilover Component: 58745
Upper Control Arm Component: 58551DJ
Rear Lower Link Component: 54000
Rear Coil Spring Component: 52700
Rear Shock Component: 57810P
OEM Wheel & Tire Compatible: Yes
Recommended Tire Size: 33" x 11.50"
Installation: Bolt-On
Cutting Required: No
Welding Required: No
Shocks Serviceable: Yes
Shipping Weight: Approximately 150 lbs.
UPC: 840103416861

Frequently Asked Questions

What vehicles does ICON K53055 fit?
ICON lists K53055 for the 2003-2009 Toyota 4Runner and 2007-2009 Toyota FJ Cruiser.

How much lift does ICON K53055 provide?
The front Extended Travel coilovers provide 0-3.5 inches of adjustable lift, while the included rear coil springs provide approximately 2 inches of rear lift.

What is the difference between ICON Stage 4 and Stage 5?
The major Stage 5 upgrade is the front shock package. K53055 replaces the Stage 4 internal-reservoir front coilovers with 2.5 Series Extended Travel Remote Reservoir coilovers, giving the vehicle remote reservoir shocks front and rear.

What are the advantages of remote reservoir front coilovers?
Remote reservoirs increase shock oil volume and improve heat management, helping maintain more consistent damping during prolonged rough-terrain driving.

Does K53055 have remote reservoir shocks front and rear?
Yes. Stage 5 uses 2.5 Series Remote Reservoir Extended Travel coilovers in front and 2.5 Aluminum Series Remote Reservoir shocks in the rear.

What upper control arms are included?
K53055 includes ICON 58551DJ billet aluminum upper control arms with Delta Joint.

What rear lower links are included?
K53055 includes ICON 54000 billet aluminum rear lower links with on-vehicle pinion angle adjustment.

What is ICON Bump Zone technology?
Bump Zone increases rear shock damping during the final 2 inches of compression travel, helping reduce harsh bottom-out and improve suspension control.

Does K53055 fit a 2010-2014 FJ Cruiser?
No. ICON lists the complete K53055 system specifically for the 2007-2009 FJ Cruiser.

Does K53055 fit the Lexus GX?
Several individual components included in K53055 have Lexus GX applications, but ICON does not list the complete K53055 Stage 5 system for the GX. Follow ICON's complete-system fitment.

What size tires does ICON recommend?
ICON recommends 33" x 11.50" aftermarket tires with its specified wheel dimensions. Larger tires require additional clearance modifications.

Can I use factory wheels and tires?
Yes. ICON specifically lists OEM wheels and tires as compatible.

Can the remote reservoir mounts interfere with aftermarket parts?
Yes. ICON notes that remote reservoir mounting brackets may interfere with certain aftermarket bumper mounts or windshield washer bottles.

Are the ICON shocks rebuildable?
Yes. ICON states that the shocks included with K53055 are fully serviceable.

Does installation require cutting or welding?
No. ICON designed K53055 as a bolt-on suspension system with no cutting or welding required.