SuperPro SPF4059-25K Rear Sway Bar Mount Bushing Kit 2010-2023 Lexus GX460 2007-2014 Toyota FJ Cruiser

The SuperPro SPF4059-25K is a rear sway bar mount bushing kit built for the 2010 through 2023 Lexus GX460 and 2007 through 2014 Toyota FJ Cruiser, covering all available trims on both platforms. The SPF4059-25K replaces the factory rubber sway bar mount bushings with precision-molded polyurethane units engineered specifically for the 25mm rear sway bar diameter on these vehicles. Unlike generic one-size-fits-all bushings with cheap universal hardware, each bushing is designed to integrate directly into the factory OEM mounting hardware and brackets already on the vehicle. The result is tighter body control, reduced sway, and a longer-lasting upgrade that eliminates the frequent replacement cycles that worn OEM rubber demands. Every SPF4059-25K kit is backed by SuperPro's Lifetime Warranty.

Why the SuperPro SPF4059-25K Outperforms OEM Rubber

The factory sway bar mount bushings on the Lexus GX460 and Toyota FJ Cruiser are made from rubber, which degrades over time from heat cycling, UV exposure, ozone, and the constant compression loads placed on the mount during cornering and body roll. As the rubber breaks down, the sway bar begins to move within the mount, introducing slop that translates directly into vague steering response, excessive body roll, and unpredictable handling on uneven terrain. SuperPro's polyurethane compound is chemically resistant to all of these failure modes. It holds its dimensional stability across a far wider temperature range than rubber and does not compress, crack, or deform under the load cycles that destroy OEM bushings over time.

This bushing also incorporates SuperPro's grease retention technology: internal grooves machined into the bushing bore trap and distribute grease evenly across the sway bar contact surface. This eliminates the squeaking and dry-contact binding that polyurethane bushings without grease retention features are known to develop. The result is a bushing that performs silently and consistently for the life of the vehicle.

Vehicle-Specific Fit, Not a Universal Bushing

This kit is engineered specifically for the 25mm rear sway bar diameter and OEM mount geometry of the Lexus GX460 and Toyota FJ Cruiser. The bushing outside diameter of 31.70mm is matched to the factory bracket clamp inner surface, and the 32.50mm length is dimensioned to align correctly with the bracket bolt spacing on these platforms. This precision fit means no shimming, no drilling, and no modification to the factory mounting hardware. The OEM steel brackets remain in place and are reused.

Fitment: 2010-2023 Lexus GX460 and 2007-2014 Toyota FJ Cruiser

The SPF4059-25K fits the 2010 through 2023 Lexus GX460 (all trims) and the 2007 through 2014 Toyota FJ Cruiser (all trims) at the rear sway bar mount position. Both platforms share the same 25mm rear sway bar specification that this kit is engineered for. Confirm your sway bar diameter before ordering if your vehicle has been modified with an aftermarket sway bar.

Full Specifications

What Is Included

• 2x SuperPro polyurethane rear sway bar mount bushings (25mm bar diameter fitment)
• SuperPro assembly grease

Installation Overview

This is a direct replacement bushing kit that uses the factory OEM steel mounting brackets already on the vehicle. No new bracket is required and no drilling or cutting is needed. A standard rear sway bar mount bushing replacement on the Lexus GX460 or Toyota FJ Cruiser takes approximately 30 to 60 minutes with basic hand tools.

• Lift and safely support the vehicle
• Remove the OEM steel sway bar mount clamp bolts and lift the bracket free
• Remove the old rubber bushings from the sway bar
• Apply the included SuperPro grease to the inside bore of the new polyurethane bushings
• Slide the new bushings onto the sway bar at the mount locations
• Reinstall the factory steel clamp brackets and torque to OEM specification
• A wheel alignment check is recommended after any suspension component replacement

About SuperPro

SuperPro is an Australian suspension bushing manufacturer with over 30 years of engineering and production experience. SuperPro bushings are manufactured from a proprietary polyurethane compound developed in-house and refined specifically for automotive suspension applications. Every SPF series bushing is vehicle-specific, engineered to OEM mounting dimensions, and backed by a Lifetime Warranty. SuperPro products are used across OEM replacement, performance street, and motorsport applications worldwide.

Frequently Asked Questions

What does the SuperPro SPF4059-25K fit?
This kit fits the 2010 through 2023 Lexus GX460 (Base, Luxury, Black Line Edition, and Premium trims) and the 2007 through 2014 Toyota FJ Cruiser (Base, Trail Teams Special Edition, and TRD Special Edition trims) at the rear sway bar mount position.

Does this kit include the steel mounting bracket?
No. This is a bushing-only kit. It is designed to be installed using the factory OEM steel sway bar mount clamps already on the vehicle. No new bracket is required or included.

What size sway bar does this kit fit?
This kit is engineered for a 25mm diameter sway bar, which is the factory OEM rear sway bar diameter on the Lexus GX460 and Toyota FJ Cruiser. If your vehicle has been upgraded to an aftermarket sway bar with a different diameter, verify the bar diameter before ordering.

Will polyurethane bushings squeak after installation?
Not if installed correctly. SuperPro's grease retention groove technology is built into the bushing bore to hold and distribute grease evenly across the sway bar contact surface. Apply the included SuperPro grease to the bushing bore during installation. Squeaking is typically caused by dry contact between the bushing and bar, which this design prevents.

What is the warranty on this kit?
This kit carries SuperPro's Lifetime Warranty for the original purchaser. There are no mileage limits and no restrictions for off-road or performance use. The warranty covers manufacturer defects and does not cover installation damage, impact damage, or misapplication.

Will replacing the sway bar bushings affect my factory warranty?
No. Under the Magnuson-Moss Warranty Act, an automaker cannot void your factory warranty simply because you installed an aftermarket suspension component. The dealer would need to prove that the SuperPro bushing directly caused the specific failure being claimed before denying a warranty claim.

How long does installation take?
A rear sway bar mount bushing replacement on the Lexus GX460 or Toyota FJ Cruiser typically takes 30 to 60 minutes with basic hand tools and a vehicle lift or jack stands. No special tools are required beyond standard sockets and a torque wrench.

Do I need a wheel alignment after installing these bushings?
SuperPro recommends a wheel alignment check any time a suspension component is replaced. While replacing sway bar mount bushings alone does not alter alignment angles, it is good practice to confirm alignment after any suspension service.

Is this kit compatible with a lifted Lexus GX460?
Yes. This kit replaces the factory mount bushings and uses the OEM mounting bracket geometry, so it is compatible with lifted GX460 builds that retain the factory rear sway bar. If your lift kit replaced the factory sway bar with an extended-travel unit of a different diameter, verify the bar diameter matches 25mm before ordering.

How many bushings are included?
The kit includes 2 polyurethane bushings, one for each side of the rear sway bar mount, covering both mount positions in a single purchase.