SPL Parts Front Caster Rod Bushings (NON-ADJ)

2020–2023 Toyota GR Supra & 2019+ BMW Z4

SPL CRBN G29

Overview:

The SPL Parts Front Caster Rod Bushings (Non-Adjustable) are precision-engineered suspension components designed to replace the stock rubber bushings found in the front caster rods of the Toyota GR Supra (2020–2023, A90) and BMW Z4 (2019+, G29). These bushings utilize articulating spherical bearings to eliminate the deflection and friction inherent in factory rubber bushings, maintaining optimal suspension geometry under load. This upgrade enhances braking response, steering precision, and overall handling feedback, making it an essential modification for enthusiasts seeking improved vehicle dynamics without compromising daily drivability.

Ideal for drivers who demand sharper control and consistent suspension performance, these bushings provide a direct connection between suspension components, reducing unwanted movement and improving feedback from the road.

Key Features:

Engineered for durability and performance, the SPL Parts Front Caster Rod Bushings offer the following key features:

• Direct replacement for factory rubber bushings with low-friction spherical bearings
• Massive 1-inch FK Racing spherical bearings with self-lubricating Teflon liners for smooth articulation
• 6061-T6 aluminum bearing housing with outer knurl for secure fitment and strength
• Eliminates bushing deflection to maintain precise suspension geometry under load
• Improves braking performance and handling feedback by reducing suspension compliance
• Non-adjustable design for straightforward installation and consistent performance
• Sold as a pair to upgrade both front caster rods simultaneously
• Proudly made, engineered, and assembled in the USA

Construction & Design:

The bushings feature a robust 6061-T6 aluminum housing, chosen for its excellent strength-to-weight ratio and corrosion resistance. The spherical bearings are FK Racing units, known for their high-quality construction and durability in motorsport applications. Each bearing incorporates a self-lubricating Teflon liner, which minimizes friction and wear, ensuring smooth articulation and long service life without the need for regular maintenance. The outer knurl on the aluminum housing enhances grip within the suspension components, preventing unwanted movement and ensuring a secure fit.

This combination of materials and design elements results in a bushing that is both lightweight and capable of withstanding the rigors of spirited driving and track use.

Performance & Sound

By replacing the compliant rubber bushings with rigid spherical bearings, these caster rod bushings significantly improve steering precision and suspension feedback. Drivers will notice sharper turn-in, more consistent handling characteristics, and improved braking stability due to the maintained suspension geometry. While these bushings do not directly affect engine or exhaust sound, the enhanced feedback and control contribute to a more connected and engaging driving experience.

Installation & Fitment:

Installation is a direct bolt-on replacement for the front caster rod bushings on the 2020–2023 Toyota GR Supra (A90) and 2019+ BMW Z4 (G29). No modifications to the vehicle or suspension components are required. The non-adjustable design simplifies the installation process, making it accessible for experienced enthusiasts and professional installers alike. Detailed installation instructions are provided by SPL Parts to ensure proper fitment and optimal performance.

What's Included:

• Pair of SPL Parts Front Caster Rod Bushings (Non-Adjustable)
• 6061-T6 aluminum bearing housings with knurl
• FK Racing 1" spherical bearings with Teflon liners
• Installation instructions

Ideal For:

These bushings are perfect for Toyota GR Supra and BMW Z4 owners seeking enhanced suspension precision and handling performance without the complexity of adjustable components. They are well-suited for street performance enthusiasts, track day drivers, and anyone looking to upgrade their vehicle’s front suspension for improved feedback and braking stability.

SPL Parts is a manufacturer specializing in high-performance suspension components, including control arms, toe links, and sway bar endlinks, primarily for vehicles like Nissan 350Z/370Z, GTR, BMW M-Series, Toyota Supra, and Subaru platforms. Their products are designed to enhance handling and stability for both street and track applications, offering adjustability and durability to meet the demands of performance enthusiasts.