SPL Parts Adjustable Front Caster Rod Monoball Bushings — 20+ Toyota GR Supra (A90) / 19+ BMW Z4 (G29)

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SKU: SPPSPL CRB G29
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About SPL Parts

SPL Parts engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full SPL Parts lineup with fast shipping and expert fitment support — order with confidence.

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SPL Parts Adjustable Front Caster Rod Monoball Bushings for Toyota GR Supra (A90) & BMW Z4 (G29)

Optimize your Toyota GR Supra (A90) or BMW Z4 (G29) with the SPL Parts FKS Series Adjustable Front Caster Rod Bushings. These advanced bushings replace the factory rubber components with high-performance spherical bearings, significantly reducing deflection and friction. This results in improved suspension geometry control, leading to better braking stability, sharper handling, and more precise steering feedback.

Performance Enhancements:

  • Eliminate Bushing Deflection: Maintain consistent suspension geometry under extreme conditions.
  • Reduced Friction: Spherical bearings allow for smoother suspension articulation and improved responsiveness.
  • Adjustable Caster: Integrated offset bearing spacers provide +/- 4 degrees of caster adjustment for fine-tuning.
  • High-Quality Components: Utilizes 1" FK Racing Bearings with self-lubricating Teflon liners housed in CNC-machined 6061-T6 aluminum.
  • Enhanced Driving Dynamics: Experience a more connected feel to the road and improved chassis stability.

Designed for enthusiasts seeking peak performance, these bushings are essential for track days, spirited driving, or any situation where precise suspension control is paramount. The kit includes a pair of bushings, designed for direct installation onto OEM arms. Unlock the full potential of your Supra or Z4's suspension. Purchase the SPL Parts Adjustable Front Caster Rod Monoball Bushings at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2019-2024 BMW Z4 sDrive30i
2020 BMW Z4 M40i First Edition
2020-2021 BMW Z4 sDrive M40i
2022-2024 BMW Z4 M40i
2020-2023 Toyota GR Supra Premium
2020-2023 Toyota GR Supra Base
2021-2022 Toyota GR Supra A91 Edition
2023 Toyota GR Supra A91-MT Edition

Product Details

Product Description
Part Numbers
Sizing & Fit

About SPL Parts

SPL Parts engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full SPL Parts lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

SPL Parts Adjustable Front Caster Rod Monoball Bushings for Toyota GR Supra (A90) & BMW Z4 (G29)

Optimize your Toyota GR Supra (A90) or BMW Z4 (G29) with the SPL Parts FKS Series Adjustable Front Caster Rod Bushings. These advanced bushings replace the factory rubber components with high-performance spherical bearings, significantly reducing deflection and friction. This results in improved suspension geometry control, leading to better braking stability, sharper handling, and more precise steering feedback.

Performance Enhancements:

  • Eliminate Bushing Deflection: Maintain consistent suspension geometry under extreme conditions.
  • Reduced Friction: Spherical bearings allow for smoother suspension articulation and improved responsiveness.
  • Adjustable Caster: Integrated offset bearing spacers provide +/- 4 degrees of caster adjustment for fine-tuning.
  • High-Quality Components: Utilizes 1" FK Racing Bearings with self-lubricating Teflon liners housed in CNC-machined 6061-T6 aluminum.
  • Enhanced Driving Dynamics: Experience a more connected feel to the road and improved chassis stability.

Designed for enthusiasts seeking peak performance, these bushings are essential for track days, spirited driving, or any situation where precise suspension control is paramount. The kit includes a pair of bushings, designed for direct installation onto OEM arms. Unlock the full potential of your Supra or Z4's suspension. Purchase the SPL Parts Adjustable Front Caster Rod Monoball Bushings at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2019-2024 BMW Z4 sDrive30i
2020 BMW Z4 M40i First Edition
2020-2021 BMW Z4 sDrive M40i
2022-2024 BMW Z4 M40i
2020-2023 Toyota GR Supra Premium
2020-2023 Toyota GR Supra Base
2021-2022 Toyota GR Supra A91 Edition
2023 Toyota GR Supra A91-MT Edition

Product Details

Product Description

About SPL Parts

SPL Parts engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full SPL Parts lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

SPL Parts Adjustable Front Caster Rod Monoball Bushings for Toyota GR Supra (A90) & BMW Z4 (G29)

Optimize your Toyota GR Supra (A90) or BMW Z4 (G29) with the SPL Parts FKS Series Adjustable Front Caster Rod Bushings. These advanced bushings replace the factory rubber components with high-performance spherical bearings, significantly reducing deflection and friction. This results in improved suspension geometry control, leading to better braking stability, sharper handling, and more precise steering feedback.

Performance Enhancements:

  • Eliminate Bushing Deflection: Maintain consistent suspension geometry under extreme conditions.
  • Reduced Friction: Spherical bearings allow for smoother suspension articulation and improved responsiveness.
  • Adjustable Caster: Integrated offset bearing spacers provide +/- 4 degrees of caster adjustment for fine-tuning.
  • High-Quality Components: Utilizes 1" FK Racing Bearings with self-lubricating Teflon liners housed in CNC-machined 6061-T6 aluminum.
  • Enhanced Driving Dynamics: Experience a more connected feel to the road and improved chassis stability.

Designed for enthusiasts seeking peak performance, these bushings are essential for track days, spirited driving, or any situation where precise suspension control is paramount. The kit includes a pair of bushings, designed for direct installation onto OEM arms. Unlock the full potential of your Supra or Z4's suspension. Purchase the SPL Parts Adjustable Front Caster Rod Monoball Bushings at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2019-2024 BMW Z4 sDrive30i
2020 BMW Z4 M40i First Edition
2020-2021 BMW Z4 sDrive M40i
2022-2024 BMW Z4 M40i
2020-2023 Toyota GR Supra Premium
2020-2023 Toyota GR Supra Base
2021-2022 Toyota GR Supra A91 Edition
2023 Toyota GR Supra A91-MT Edition

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