What is the benefit of using spherical bearings over rubber bushings?

Spherical bearings, like those used in these caster rod bushings, articulate with very little friction and eliminate the flex found in rubber bushings. This means your suspension geometry stays more consistent under load, leading to improved handling and braking feedback.

Can I adjust the caster on my vehicle with this kit?

Yes, this kit includes offset bearing spacers that allow for up to +/- 4 degrees of caster adjustment. This enables you to fine-tune your vehicle's steering characteristics and stability.

Does this kit include the original caster rods?

No, the original caster rods are not included with this kit. You will need to use your vehicle's existing caster rods when installing these adjustable bushings.

SPL Parts 2020+ Toyota GR Supra (A90) / 2019+ BMW Z4 (G29) Adj Front Caster Rod Monoball Bushings

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Specifications

Brand: SPL Parts
Part #: SPL CRB G29
UPC: SPLCRBG29

SPL Parts 2020+ Toyota GR Supra (A90) / 2019+ BMW Z4 (G29) Adj Front Caster Rod Monoball Bushings

Name: SPL Parts 2020+ Toyota GR Supra (A90) / 2019+ BMW Z4 (G29) Adj Front Caster Rod Monoball Bushings
Brand: SPL Parts
Price: 499.39 USD
Availability: InStock

$499.39

Only 3 left in stock

Fits 2019-2024 BMW Z4. SPL Parts adjustable caster rod bushings replace stock rubber for improved handling and braking feedback.

Key Features

Fits 2019-2024 BMW Z4 and 2020-2023 Toyota GR Supra.
Replaces stock rubber bushings with low-friction spherical bearings to eliminate deflection.
Maintains optimum suspension geometry under load for improved braking and handling feedback.
Features 1-inch FK Racing bearings with self-lubricating Teflon liners for performance and durability.
CNC machined 6061-T6 aluminum bearing housings with outer knurl.
Includes innovative CNC machined offset bearing spacers for +/- 4 degrees of caster adjustment.

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Fits these vehicles

BMW Z4 2019-2024
Toyota GR Supra 2020-2023

Product Details

SPL Parts is known for making well-built suspension components that help racers and performance drivers get the most out of their cars. If you're looking to dial in the suspension on your 2019-2024 BMW Z4 or 2020-2023 Toyota GR Supra, these adjustable front caster rod bushings are a solid option. They replace the factory rubber bushings with spherical bearings, which means less flex and more direct feedback from your suspension.

These bushings use large, 1-inch FK Racing bearings with Teflon liners, designed to reduce friction and maintain suspension geometry even under heavy load. This helps keep your alignment consistent during hard braking and cornering, improving both handling and braking performance. The housings are CNC machined from 6061-T6 aluminum, and the kit includes offset spacers that let you adjust your caster by up to +/- 4 degrees. This allows for fine-tuning your car's steering feel and stability.

This kit is sold as a pair and is proudly made in the USA. Keep in mind that the original caster rods are not included with this kit, so you'll need to use your existing ones.