ICON Vehicle Dynamics Delta Joint 1" Non-ICON UCA Retrofit Kit for Toyota and Lexus

The ICON Vehicle Dynamics Delta Joint 1" Non-ICON UCA Retrofit Kit replaces standard 1" uniball joints in aftermarket upper control arms on 2003–2024 Toyota 4Runner, 2007–2014 Toyota FJ Cruiser, 2008–2021 Toyota Land Cruiser 200 Series, and 2003–2023 Lexus GX vehicles, delivering sealed, greaseable, high-angle articulation without the corrosion vulnerability of an open uniball. Each kit fits stock-length upper control arms only and will not fit ICON-brand front upper control arms.

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.

Sealed Against the Elements

A standard uniball allows excellent articulation but leaves metal-on-metal contact exposed to water, road salt, and trail debris. For a daily-driven truck or SUV that also sees off-road use, that exposure is a real liability. The Delta Joint addresses this directly: a zinc-plated housing forms the outer corrosion barrier, and a tough grease seal closes off the inner workings from contamination. For a buyer who runs the same vehicle to work on Monday and down a muddy two-track on Saturday, that sealed design means the joint stays functional and quiet rather than corroding into a liability.

Greaseable Metal-on-Metal Construction for Long-Term Durability

Metal-on-metal internals and a greaseable design let the Delta Joint be serviced over time rather than replaced at the first sign of wear. A carburized taper pin reduces internal friction, resists corrosion at the pin itself, and limits thread galling during assembly and future service. Application-specific taper pins are sized for precise fit across the listed vehicles, so the joint seats correctly rather than relying on generic hardware. The Delta Joint delivers pullout strength that exceeds comparable industry-standard uniballs.

High Angularity Without Sacrificing Robustness

The Delta Joint is patented (U.S. Pat. 10,731,700) for combining the angularity of a uniball (necessary for lifted applications where suspension travel demands greater range of motion) with the sealed, serviceable durability of a conventional ball joint. For a builder running a lifted 4Runner or GX on aftermarket UCAs, this means the upper joint can keep up with increased suspension travel without introducing the bind or noise that a standard ball joint would produce at high angles.

Features

• Retrofit compatibility: installs into aftermarket UCAs using a 1" uniball seat (2.125" OD, 1" height); replaces WSSX16, AWX16, WC16, WE16, WSSB16, WR16, and ABW16 uniballs
• Kit contents: one pair of Delta Joints, retaining rings, and anti-seize compound included
• Sealed housing: zinc-plated outer housing and grease seal protect internals from road salt, water, and debris
• Greaseable design: metal-on-metal internals with grease fitting allow ongoing maintenance and noise-free operation
• Carburized taper pin: reduces internal friction, corrosion resistance at the pin, and limits thread galling on assembly
• Patented design: U.S. Pat. 10,731,700

Specifications

Who This Is For and Isn't

This kit suits builders running aftermarket upper control arms with a 1" uniball seat on a 2003–2024 Toyota 4Runner, 2007–2014 FJ Cruiser, 2008–2021 Land Cruiser 200 Series, or 2003–2023 Lexus GX who want a sealed, serviceable joint for daily driving and off-road use. It is designed for stock-length UCAs and lifted applications where high-angle articulation is required.

This kit does not fit ICON-brand front upper control arms. It is not compatible with uniballs outside the 2.125" OD / 1" height specification, and it is not designed for extended-length or non-stock UCA configurations. Professional installation is required; the installer must cycle the suspension and verify no bind before returning the vehicle to service. California residents: this product contains chemicals known to the State of California to cause cancer, birth anomalies, or other reproductive harm (Prop 65).

Common Questions

Will this kit fit my ICON upper control arms?

The ICON Delta Joint 1" Non-ICON UCA Retrofit Kit will not fit ICON-brand front upper control arms. It is designed for aftermarket UCAs that use a 1" uniball seat with a 2.125" outside diameter and 1" height, including those using WSSX16, AWX16, WC16, WE16, WSSB16, WR16, or ABW16 uniballs.

What vehicles does this Delta Joint kit fit?

This retrofit kit fits stock-length aftermarket upper control arms on the 2003–2024 Toyota 4Runner, 2007–2014 Toyota FJ Cruiser, 2008–2021 Toyota Land Cruiser 200 Series, and 2003–2023 Lexus GX. Fitment verification, including cycling the suspension to check for bind, is the responsibility of the installer.

What is included in the kit?

Each Delta Joint retrofit kit includes one pair of Delta Joints, retaining rings, and a supply of anti-seize compound. No additional uniball hardware is included; the kit is intended to replace existing 1" uniballs in compatible aftermarket upper control arms.

How does the Delta Joint resist corrosion compared to a standard uniball?

The Delta Joint uses a zinc-plated housing as an outer corrosion barrier and a grease seal to keep moisture, road salt, and debris away from the internal components. A carburized taper pin adds a further layer of corrosion resistance at the pin itself. A standard open uniball has no equivalent sealing, leaving metal-on-metal contact exposed to the elements.

Does the Delta Joint require professional installation?

Professional installation is required for the ICON Delta Joint retrofit kit. After installation, the suspension must be cycled and inspected for bind before the vehicle is returned to service. Failure to verify clearance can lead to component failure or injury, per ICON's technical notes for this product.