ICON Stage 6 Suspension System with Billet Links & Remote Reservoir Shocks – 2010-2024 4Runner & 2010-2014 FJ Cruiser | K53066

Upgrade your Toyota with the ICON Vehicle Dynamics Stage 6 Suspension System, part #K53066, a comprehensive suspension package designed for increased wheel travel, improved ride quality, enhanced vehicle control and serious off-road performance.

Designed for the 2010-2024 Toyota 4Runner and 2010-2014 Toyota FJ Cruiser, the ICON Stage 6 system combines Extended Travel 2.5 Series Remote Reservoir front coilovers, billet aluminum upper control arms with ICON Delta Joint, billet aluminum rear lower links, billet aluminum rear upper links, an adjustable rear track bar, 2-inch rear lift coil springs, and 2.5 Aluminum Series Remote Reservoir rear shocks with Bump Zone technology.

Compared with the ICON Stage 5 system, Stage 6 adds billet rear upper links and an adjustable rear track bar, giving the rear suspension much more complete geometry control.

The result is a high-performance suspension system that improves wheel travel, shock damping, rear axle placement, pinion angle, articulation and overall vehicle control both on and off road.

Vehicle Fitment

Toyota 4Runner

• 2010-2024

Toyota FJ Cruiser

• 2010-2014

IMPORTANT: ICON lists the complete K53066 Stage 6 system specifically for 2010-2024 Toyota 4Runner and 2010-2014 Toyota FJ Cruiser applications.

KDSS Compatibility

The K53066 is compatible with KDSS-equipped vehicles.

Because Stage 6 includes the ICON 54200 Adjustable Rear Track Bar, the system already incorporates the rear axle alignment component required for KDSS applications.

ICON notes:

• Front sway bar relocation brackets are not used on KDSS-equipped vehicles

• Certain model years may require trimming for proper front reservoir bracket fitment

Features

• Complete ICON Stage 6 Suspension System

• Fits 2010-2024 Toyota 4Runner

• Fits 2010-2014 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 capacity and cooling

• ICON billet aluminum upper control arms

• ICON patented Delta Joint

• Improved front suspension and alignment geometry

• On-vehicle caster and camber adjustment

• ICON billet aluminum rear lower links

• ICON billet aluminum rear upper links

• Adjustable rear track bar included

• On-vehicle rear pinion-angle adjustment

• Proper rear axle placement after lifting

• Increased rear suspension articulation

• Reduced rear suspension deflection

• 2" rear lift coil springs

• ICON 2.5 Aluminum Series Remote Reservoir rear shocks

• ICON Bump Zone technology

• Remote reservoir shocks front and rear

• Improved shock cooling during prolonged use

• More consistent damping under demanding conditions

• Vehicle-specific front and rear shock tuning

• Increased wheel travel and ride quality over stock

• Heavy-duty 7/8" front and rear shock shafts

• 6061 aircraft-grade CNC-machined aluminum components

• Corrosion-resistant CAD-plated coilover shock bodies

• FK Rod End bearings for increased longevity and minimal deflection

• Fully serviceable shocks

• Bolt-on installation

• No cutting or welding required

• ICON Vehicle Dynamics part number K53066

What Does Stage 6 Add Over Stage 5?

The primary upgrade from ICON K53065 Stage 5 to K53066 Stage 6 is the additional rear suspension control.

Stage 5 already includes:

• Extended Travel 2.5 Series Remote Reservoir front coilovers

• Billet Delta Joint upper control arms

• Billet rear lower links

• 2" rear coil springs

• 2.5 Remote Reservoir rear shocks with Bump Zone

Stage 6 adds:

• ICON 54100 billet rear upper links

• ICON 54200 adjustable rear track bar

These components provide much more complete control over rear suspension geometry.

The rear links allow on-vehicle pinion-angle adjustment, while the adjustable track bar allows the rear axle to be properly centered beneath the vehicle after lifting.

Adjustable 0-3.5" Front Lift

The ICON Stage 6 front coilovers provide 0 to 3.5 inches of adjustable front lift.

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

Unlike a basic spacer lift, ICON's coilovers replace the factory shock and spring assemblies with performance suspension components engineered 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 heights are based on a stock-equipped vehicle. Added weight from aftermarket bumpers, winches, skid plates and other accessories can affect actual ride height.

Extended Travel 2.5 Remote Reservoir Front Coilovers

K53066 uses ICON 58747 Extended Travel 2.5 Series Vehicle-Specific Remote Reservoir Coilovers.

These coilovers combine ICON's Extended Travel design with external reservoirs to provide increased front suspension travel and improved heat management.

Key features include:

• 2.5-inch shock bodies

• Extended Travel design

• External remote reservoirs

• Increased front droop travel

• Increased shock oil capacity

• Improved heat dissipation

• More consistent damping during demanding use

• Vehicle-specific shock tuning

• Adjustable 0-3.5" front lift

• Corrosion-resistant CAD-plated shock bodies

• Heavy-duty 7/8-inch shock shafts

• 6061 aircraft-grade aluminum CNC-machined components

• FK Rod End bearings

• Fully serviceable construction

ICON Billet Upper Control Arms

The K53066 Stage 6 system includes ICON 58551DJ billet aluminum upper control arms.

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

Benefits include:

• CNC-machined 6061 billet aluminum construction

• Increased strength and durability

• Improved front suspension geometry

• Increased joint articulation

• On-vehicle caster and camber adjustment

• Helps retain factory alignment specifications

• Allows proper wheel alignment at increased ride height

• ICON patented Delta Joint

ICON Delta Joint

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

The Delta Joint is a heavy-duty high-angle ball joint designed to combine the durability and weather protection 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

Billet Rear Lower Links

The K53066 includes ICON 54000 billet aluminum rear lower links.

These links replace the factory rear lower links with stronger CNC-machined components while providing additional suspension adjustment.

Benefits include:

• CNC-machined 6061 billet aluminum construction

• Anodized for corrosion resistance

• Increased strength compared with factory links

• PTFE-lined FK rod ends

• Greaseable polyurethane bushings

• Increased suspension articulation

• Reduced suspension deflection

• ICON Double Adjuster system

• On-vehicle link-length adjustment

• On-vehicle rear pinion-angle adjustment

Billet Rear Upper Links

Stage 6 adds ICON 54100 billet aluminum rear upper links.

These upper links work with the billet rear lower links to provide much more complete control over rear axle geometry.

Benefits include:

• CNC-machined 6061 billet aluminum construction

• Increased strength compared with OE upper links

• Improved rear suspension geometry

• Additional rear axle adjustment

• Works with the lower links to optimize pinion angle

• Reduced deflection

• Increased suspension articulation

Adjustable Rear Track Bar

K53066 includes the ICON 54200 Adjustable Rear Track Bar.

Lifting a solid-axle vehicle can shift the rear axle laterally because the factory track bar has a fixed length.

The adjustable ICON track bar allows the rear axle to be properly centered beneath the vehicle after the suspension has been lifted.

Benefits include:

• Adjustable rear axle placement

• Helps center the axle after lifting

• Improved rear suspension geometry

• Increased articulation

• Required for proper KDSS fitment

• Heavy-duty construction

Complete Rear Suspension Geometry Control

With:

• Billet rear lower links

• Billet rear upper links

• Adjustable rear track bar

Stage 6 provides much more complete rear suspension adjustment than the lower ICON stages.

This allows the installer to fine-tune:

• Rear pinion angle

• Rear axle placement

• Rear suspension geometry

• Articulation

• Rear handling characteristics

2" Rear Lift Coil Springs

The K53066 includes ICON 52700 2-inch rear lift coil springs.

These springs provide approximately 2 inches of rear lift over stock, helping create a level front-to-rear stance while maintaining on-road comfort and improving off-road suspension performance.

2.5 Aluminum Series Remote Reservoir Rear Shocks

The K53066 Stage 6 system includes ICON 57810P 2.5 Aluminum Series Vehicle-Specific Remote Reservoir rear shocks.

Rear shock features include:

• 2.5-inch aluminum shock bodies

• External remote reservoirs

• Heavy-duty 7/8-inch shock shafts

• Increased shock oil volume

• Improved heat dissipation

• More consistent damping during prolonged use

• Vehicle-specific shock tuning

• Designed for 1-3 inches of rear lift

• ICON Bump Zone technology

• Fully serviceable construction

ICON Bump Zone Technology

The rear shocks feature ICON's internal Bump Zone technology.

Bump Zone provides an additional 20% of damping force to help better control hard bottom-outs.

This additional damping helps:

• Better control hard bottom-outs

• Reduce harsh suspension impacts

• Improve vehicle control

• Manage larger off-road impacts

• Maintain a smoother and more controlled ride

Remote Reservoir Shocks Front & Rear

Stage 6 uses 2.5 Series Remote Reservoir shocks at all four corners.

External reservoirs increase the total volume of shock oil and help maintain cooler operating temperatures during heavy suspension use.

Benefits include:

• Increased shock oil capacity

• Improved heat management

• Reduced shock fade

• More consistent damping

• Better performance during prolonged off-road driving

• Improved control over repeated impacts

• Excellent performance on washboard roads and rough terrain

Remote Reservoir Clearance Note

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

Vehicles equipped with aftermarket bumpers, relocated washer reservoirs or other modifications in the reservoir mounting area should be checked for clearance before installation.

Wheel & Tire Recommendations

ICON confirms that OEM wheels and tires are compatible with the K53066 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"

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.

Expedition Coil Option for Heavier Vehicles

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

This may be beneficial for 4Runners and FJ Cruisers 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 K53066 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 K53066 Stage 6 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 Stage 6 includes adjustable upper and lower rear links plus an adjustable rear track bar, the rear pinion angle and axle position should also be properly set during installation.

System Components

The ICON K53066 Stage 6 Suspension System includes:

Front Extended Travel Remote Reservoir Coilovers

• ICON 58747

• Quantity: 1 kit / 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

• On-vehicle caster/camber adjustment

Billet Rear Lower Links

• ICON 54000

• Quantity: 1 kit

• CNC-machined 6061 billet aluminum

• On-vehicle link-length and pinion-angle adjustment

Billet Rear Upper Links

• ICON 54100

• Quantity: 1 kit

• CNC-machined billet aluminum

• Increased rear suspension adjustment

Adjustable Rear Track Bar

• ICON 54200

• Quantity: 1

• Adjustable rear axle positioning

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

Product Specifications

Manufacturer: ICON Vehicle Dynamics
Part Number: K53066
Product: Stage 6 Suspension System
Toyota 4Runner Fitment: 2010-2024
Toyota FJ Cruiser Fitment: 2010-2014
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
UCA Adjustment: On-Vehicle Caster/Camber
Rear Lower Links: ICON Billet Aluminum
Rear Upper Links: ICON Billet Aluminum
Rear Track Bar: Adjustable
Rear Link Adjustment: On-Vehicle Pinion Angle
Rear Coil Spring Lift: 2"
Rear Shock Series: ICON 2.5 Aluminum Series
Rear Shock Type: Remote Reservoir
Rear Shock Lift Range: 1-3"
Rear Shock Technology: ICON Bump Zone
Front Shock Shaft: 7/8"
Rear Shock Shaft: 7/8"
Front Coilover Component: 58747
Upper Control Arm Component: 58551DJ
Rear Lower Link Component: 54000
Rear Upper Link Component: 54100
Rear Track Bar Component: 54200
Rear Coil Spring Component: 52700
Rear Shock Component: 57810P
KDSS Compatible: Yes
OEM Wheel & Tire Compatible: Yes
Recommended Tire Size: 33" x 11.50"
Installation: Bolt-On
Cutting/Welding Required: No
Shocks Serviceable: Yes
Shipping Weight: 173 lbs.
UPC: 840103417035

Frequently Asked Questions

What vehicles does ICON K53066 fit?
ICON lists K53066 for the 2010-2024 Toyota 4Runner and 2010-2014 Toyota FJ Cruiser.

How much lift does ICON K53066 provide?
The front coilovers provide 0-3.5 inches of adjustable lift, while the included rear springs provide approximately 2 inches of rear lift.

What is the difference between ICON K53065 Stage 5 and K53066 Stage 6?
Stage 6 adds ICON billet rear upper links and an adjustable rear track bar, providing much more complete control over rear suspension geometry, pinion angle and axle placement.

Does K53066 include adjustable rear upper and lower links?
Yes. It includes 54000 billet rear lower links and 54100 billet rear upper links.

What does the adjustable rear track bar do?
The ICON 54200 adjustable rear track bar allows the rear axle to be properly centered beneath the vehicle after lifting.

Can the rear pinion angle be adjusted?
Yes. The billet rear upper and lower links allow the rear pinion angle to be properly adjusted for the lifted suspension.

Does K53066 have remote reservoir shocks front and rear?
Yes. The system uses 2.5 Series Extended Travel Remote Reservoir coilovers in front and 2.5 Aluminum Series Remote Reservoir shocks in the rear.

Which upper control arms are included?
K53066 includes ICON 58551DJ billet aluminum upper control arms with Delta Joint.

What is ICON Bump Zone technology?
ICON's Bump Zone adds approximately 20% additional damping force to help better control hard bottom-outs.

Does K53066 fit KDSS-equipped vehicles?
Yes. The system is KDSS compatible, and the required ICON 54200 Adjustable Rear Track Bar is already included.

Are there special KDSS installation notes?
Yes. ICON states that the front sway bar relocation brackets are not used on KDSS-equipped vehicles and that certain model years require trimming for front reservoir bracket fitment.

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

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

Can I use factory wheels and tires?
Yes. ICON confirms that OEM wheels and tires are compatible.

Is a heavier front spring available?
Yes. ICON offers an optional 700 lb/in Expedition Coil for heavier-equipped vehicles.

Are the ICON shocks rebuildable?
Yes. The shocks included with K53066 are fully serviceable.

Does installation require cutting or welding?
No. K53066 is a bolt-on suspension system with no cutting or welding required.