ICON Stage 5 Suspension System with Tubular UCA & Remote Reservoir Coilovers – 2003-2009 4Runner & 2007-2009 FJ Cruiser | K53055T

Take your Toyota's suspension performance to the next level with the ICON Vehicle Dynamics Stage 5 Suspension System with Tubular Upper Control Arms, part #K53055T.

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, tubular steel upper control arms with ICON Delta Joint, 2-inch rear lift coil springs, tubular steel rear lower links, and 2.5 Aluminum Series Remote Reservoir rear shocks with Bump Zone technology.

Compared with the ICON K53054T Stage 4 system, Stage 5 upgrades the front suspension to Extended Travel Remote Reservoir coilovers, providing increased shock oil volume and enhanced cooling for improved performance during prolonged and demanding off-road use.

With 2.5 Series remote reservoir shocks front and rear, K53055T provides balanced high-performance damping for serious trail use while retaining the ride quality and control needed for everyday driving.

Vehicle Fitment

Toyota 4Runner

• 2003

• 2004

• 2005

• 2006

• 2007

• 2008

• 2009

Toyota FJ Cruiser

• 2007

• 2008

• 2009

IMPORTANT: ICON lists the complete K53055T Stage 5 system specifically for 2003-2009 Toyota 4Runner and 2007-2009 Toyota FJ Cruiser applications.

Individual components included in K53055T fit additional Toyota and Lexus applications, but that does not extend the fitment of the complete K53055T 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 enhanced cooling

• ICON tubular steel upper control arms

• ICON patented Delta Joint

• ICON tubular steel rear lower links

• Rear lower links provide pinion angle adjustment

• Improved rear suspension geometry

• Low-maintenance multi-durometer rear link bushings

• 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

• Increased wheel travel and ride quality over stock

• Improved suspension articulation

• Improved on-road and off-road handling

• 6061 aircraft-grade CNC-machined shock 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 K53055T

What Does Stage 5 Add Over Stage 4?

The major upgrade from K53054T Stage 4 to K53055T 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

• External remote reservoirs

• Increased front shock oil volume

• Enhanced cooling

• Improved resistance to shock fade

• Balanced remote-reservoir damping front and rear

The Stage 5 system retains the major Stage 4 components, including:

• Tubular Delta Joint upper control arms

• Tubular rear lower links

• 2" rear lift coil springs

• 2.5 Remote Reservoir rear shocks

• ICON Bump Zone technology

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

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

K53055T uses ICON 58745 Extended Travel 2.5 Series Remote Reservoir Coilovers.

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

The addition of external reservoirs increases shock oil capacity and improves 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 increase, damping performance can eventually begin to decrease.

Remote reservoirs increase the total shock oil volume and provide additional capacity for heat management.

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

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 Tubular Upper Control Arms

The K53055T Stage 5 system includes ICON 58451DJ tubular steel upper control arms.

These heavy-duty UCAs are designed to complement the Extended Travel front coilovers and provide the additional articulation required when increasing front suspension travel and ride height.

The tubular control arms provide a strong and durable alternative to ICON's billet aluminum UCA design while retaining the performance benefits of the ICON Delta Joint.

ICON Delta Joint

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

The Delta Joint is a heavy-duty high-angle ball joint designed to combine the durability of a conventional ball joint with the increased angularity and performance characteristics of a traditional uniball.

Delta Joint features include:

• Heavy-duty high-angle design

• Greater angularity than a typical 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

Tubular Steel Rear Lower Links

The K53055T system includes ICON 54000T tubular steel rear lower links.

These links replace the factory rear lower links with substantially stronger components designed for lifted and off-road applications.

Benefits include:

• Heavy-duty tubular steel construction

• Increased strength compared with OE rear links

• Adjustable rear pinion angle

• Improved rear suspension geometry

• Correct roll-steer geometry

• Low-maintenance multi-durometer bushings

• Improved on-road and off-road handling

• Direct replacement for factory rear lower links

Adjustable Rear Pinion Angle

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

The ICON tubular rear lower links allow adjustment for optimum rear pinion angle, helping maintain proper driveline geometry after the vehicle has been lifted.

This is an important functional advantage over non-adjustable factory rear links.

Correct Roll-Steer Geometry

ICON designed the tubular rear lower links to provide correct roll-steer geometry.

This contributes to predictable rear suspension behavior and improved handling both on pavement and off road.

The links therefore provide more than simply increased strength—they're designed as a functional suspension upgrade.

2" Rear Lift Coil Springs

The K53055T 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 K53055T 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

Remote Reservoir Shocks 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.

The increased fluid capacity and enhanced cooling help the shocks maintain consistent damping during prolonged suspension cycling.

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

System Components

The ICON K53055T Stage 5 Suspension System includes:

Front Extended Travel Remote Reservoir Coilovers

• ICON 58745

• Quantity: 1 kit / pair

• 2.5 Series Vehicle-Specific Remote Reservoir Coilovers

• Extended Travel

• Adjustable 0-3.5" front lift

Tubular Upper Control Arms

• ICON 58451DJ

• Quantity: 1 kit

• Tubular steel construction

• ICON Delta Joint

Tubular Rear Lower Links

• ICON 54000T

• Quantity: 1 kit

• Heavy-duty tubular steel construction

• Adjustable pinion angle

• Multi-durometer bushings

Rear Coil Springs

• ICON 52700

• Quantity: 1 kit / 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 K53055T 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 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, relocated washer reservoir 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

Spring selection should be based on the actual weight and configuration of the vehicle.

Fully Serviceable ICON Shocks

The ICON shocks included with K53055T 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 K53055T 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 includes adjustable rear lower links, the rear pinion angle should also be properly adjusted during installation.

Product Specifications

Manufacturer: ICON Vehicle Dynamics
Part Number: K53055T
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 Tubular Steel
UCA Joint: ICON Delta Joint
Rear Lower Links: ICON Tubular Steel
Rear Link Adjustment: Adjustable Pinion Angle
Rear Link Bushings: Multi-Durometer
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: 58451DJ
Rear Lower Link Component: 54000T
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: 160 lbs.
UPC: 840103416878

Frequently Asked Questions

What vehicles does ICON K53055T fit?
ICON lists K53055T for the 2003-2009 Toyota 4Runner and 2007-2009 Toyota FJ Cruiser.

How much lift does ICON K53055T 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 K53054T Stage 4 and K53055T Stage 5?
The primary Stage 5 upgrade is the front shock package. K53055T 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 is the difference between K53055 and K53055T?
K53055T uses tubular steel upper control arms and tubular steel rear lower links, while K53055 uses ICON's billet versions of those suspension components.

Does K53055T 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?
K53055T includes ICON 58451DJ tubular steel upper control arms with Delta Joint.

What rear lower links are included?
K53055T includes ICON 54000T tubular steel rear lower links with adjustable pinion angle and multi-durometer bushings.

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

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.

Can the rear pinion angle be adjusted?
Yes. ICON's tubular rear lower links allow adjustment for optimum rear pinion angle.

Does K53055T fit a 2010-2014 FJ Cruiser?
No. ICON lists the complete K53055T system specifically for the 2007-2009 FJ Cruiser.

Does K53055T fit the Lexus GX?
Several individual components included in K53055T have Lexus GX applications, but ICON does not list the complete K53055T 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 K53055T are fully serviceable.

Does installation require cutting or welding?
No. ICON designed K53055T as a bolt-on suspension system with no cutting or welding required.