ICON K53174T Stage 4 Suspension System w/Tubular UCAs for 2003-2009 Lexus GX470

Vehicle Fitment

• 2003-2009 Lexus GX470 (Sport Utility 4D), 4.7L V8, 4WD

Fitment Notes

• Compatible with KDSS (Kinetic Dynamic Suspension System) equipped vehicles. Front sway bar relocation brackets included in kit are NOT used on KDSS-equipped vehicles.
• KDSS-equipped vehicles require the optional ICON Rear Adjustable Track Bar (part #54200), sold separately.
• Certain model years may require trimming of the front reservoir bracket for proper fitment - verify during installation.
• The rear coil spring conversion kit (ICON #56110) is included specifically to eliminate the factory rear air bag suspension on the GX470 and convert it to a coil spring setup.
• Lift heights indicated are based on a stock-equipped vehicle with no additional weight. Heavier-equipped vehicles may benefit from the optional 700 lb coil spring (sold separately).
• Larger tires may fit but may require fender trimming and additional modifications.
• This kit is specific to the 2003-2009 Lexus GX470 and does not fit the GX460.

Features

• Vehicle-specific Stage 4 system - the most comprehensive ICON suspension upgrade for the GX470, combining extended travel front coilovers, tubular UCAs, remote reservoir rear shocks, rear lower trailing arms, rear coil springs, and rear air bag conversion in a single kit
• Extended travel 2.5" coilover shocks with internal reservoirs provide adjustable front lift from 0-3.5" over stock, allowing fitment of larger, more aggressive wheel and tire combinations
• Tubular steel Delta Joint upper control arms provide critical caster correction and expanded wheel travel geometry when used with extended travel coilovers
• ICON patented Delta Joint technology combines the durability and weather resistance of a factory-style ball joint with the high-articulation performance of a motorsports-grade uniball
• 2.5 Aluminum Series remote reservoir rear shocks with vehicle-specific valving deliver superior rear damping performance and fade resistance compared to 2.0 Series alternatives
• ICON "Bump Zone" technology in rear shocks significantly increases damping in the final 2" of compression travel, preventing harsh bottom-out and maintaining controlled ride quality over rough terrain
• ICON rear 2" lift coil springs engineered to complement the rear shock valving for balanced front-to-rear damping characteristics
• Rear coil spring conversion kit (56110) eliminates the factory rear air bag suspension, replacing it with a reliable, maintenance-free coil spring setup
• Tubular steel rear lower trailing arms are significantly stronger than OE units, feature multi-durometer low-maintenance bushings, and are adjustable for optimum pinion angle
• Rear trailing arm design engineered to correct roll steer geometry for optimal handling both on and off-road at lifted ride heights
• 100% bolt-on installation - no cutting or welding required
• All shocks are fully serviceable and re-valvable by any qualified shock technician

Specifications

• Front Coilover Diameter: 2.5 inches (internal reservoir)
• Front Lift Range: 0-3.5" over stock (height adjustable via coilover collar)
• Rear Shock Type: 2.5 Aluminum Series Remote Reservoir (pair)
• Rear Shock Lift Range: 1-3" over stock
• Rear Spring Lift: 2" over stock (linear rate)
• Rear Trailing Arm Type: Tubular steel, multi-durometer bushing, adjustable pinion angle
• UCA Type: Tubular steel with ICON Delta Joint
• UCA Articulation: High-angle Delta Joint combining ball joint durability with uniball performance
• Rear Conversion: Coil spring conversion replaces factory rear air bags (GX470-specific)
• Position: Front (Left & Right coilovers + UCAs), Rear (Left & Right shocks, springs, trailing arms)
• Installation: 100% bolt-on, no cutting or welding required

Included Components

• 1x ICON 58645 - Extended Travel 2.5 VS Internal Reservoir Front Coilover Kit (Left & Right)
• 1x ICON 58451DJ - Tubular Upper Control Arm Delta Joint Kit (Left & Right UCAs)
• 1x ICON 54000T - Tubular Lower Trailing Arm Kit (Left & Right)
• 1x ICON 52700 - Rear 2" Lift Coil Spring Kit (Left & Right springs)
• 1x ICON 56110 - GX470 Rear Coil Spring Conversion Kit (eliminates factory rear air bags)
• 1x ICON 57810P - 2.5 VS Remote Reservoir Rear Shock Pair (Left & Right)

Product Description

The ICON Vehicle Dynamics K53174T is the ultimate Stage 4 suspension system for the 2003-2009 Lexus GX470, delivering a comprehensive overhaul of the vehicle's entire suspension from front to rear. At the core of the front system is ICON's extended travel 2.5" internal reservoir coilover kit (58645), which provides 0-3.5" of adjustable lift over stock. Paired with tubular steel Delta Joint upper control arms (58451DJ), the front system achieves both the extended wheel travel and the caster geometry correction required to maintain precise handling and alignment at lifted ride heights. The Delta Joint technology at the heart of the UCAs combines the proven durability of factory-style ball joints with the high-articulation capability of motorsports-grade uniballs - delivering superior performance in a serviceable, weather-resistant package.

The rear of the K53174T is equally comprehensive. ICON's 2.5 Aluminum Series remote reservoir rear shocks (57810P) are vehicle-specifically valved and incorporate ICON's "Bump Zone" technology, which dramatically increases damping resistance in the final 2 inches of compression travel to eliminate harsh bottom-out on rough terrain. These shocks work in concert with ICON's 2" lift rear coil springs (52700) for balanced front-to-rear ride quality. The tubular steel lower trailing arm kit (54000T) replaces the weaker OE units with stronger, adjustable arms featuring multi-durometer bushings that allow pinion angle correction and restore proper roll steer geometry at the new ride height. Critically for the GX470 specifically, the kit includes ICON's rear coil conversion kit (56110), which eliminates the factory rear air bag suspension entirely and replaces it with a reliable, maintenance-free coil spring setup.

GX470 owners should note that this system is fully compatible with the optional Kinetic Dynamic Suspension System (KDSS). On KDSS-equipped vehicles, the front sway bar relocation brackets included in the kit are not used, and the optional ICON rear adjustable track bar (part #54200) is required separately to maintain proper rear axle alignment. Certain model years may also require minor trimming of the front reservoir bracket during installation. The K53174T is exclusively designed for the 2003-2009 Lexus GX470 platform and is not compatible with the GX460. For GX470 owners seeking the highest level of off-road capability, on-road composure, and long-term reliability from a fully rebuildable system, the K53174T represents the pinnacle of ICON's suspension engineering for this platform.