SPL Parts 2021+ BMW G8X(Except M2) Caster Bushings (Adjustable)

SKU: SPPSPL CRB G8X
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Front Caster Rod Bushings (CRB) replace the stock flexible rubber ...Read More

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Sale price$487.99
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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
Front Caster Rod Bushings (CRB) replace the stock flexible rubber bushings with low friction, articulating Spherical Bearings eliminating bushing deflection and reducing friction. This maintains optimum suspension geometry under load to improve braking and handling feedback. Massive 1" sized FK Racing Bearings with self lubricating Teflon liners are used to ensure maximum performance and durability. Innovative CNC machined offset bearing spacers provide +/- 2 degrees of caster adjustment. OEM arms not included. Sold as a pair. Made in the USA. Caster Rod Bushings Features: 6061-T6 Aluminum bearing housing with outer knurl 6061-T6 Aluminum offset spacers provide +/-2 degrees of caster adjustment FK 1" spherical bearings Applications: 2022+ BMW G8X (M3 and M4) Installation Instructions: SPL Front Caster Rod Bushings

This Part Fits:

Year Make Model Submodel
2021-2023,2025 BMW M3 Base
2021-2023,2025 BMW M3 Competition
2022-2023,2025 BMW M3 Competition xDrive
2021-2026 BMW M4 Base
2021-2026 BMW M4 Competition
2022-2026 BMW M4 Competition xDrive
2025 BMW M4 CS
2023 BMW M4 CSL

Product Details

Product Description
Part Numbers
Sizing & Fit
Front Caster Rod Bushings (CRB) replace the stock flexible rubber bushings with low friction, articulating Spherical Bearings eliminating bushing deflection and reducing friction. This maintains optimum suspension geometry under load to improve braking and handling feedback. Massive 1" sized FK Racing Bearings with self lubricating Teflon liners are used to ensure maximum performance and durability. Innovative CNC machined offset bearing spacers provide +/- 2 degrees of caster adjustment. OEM arms not included. Sold as a pair. Made in the USA. Caster Rod Bushings Features: 6061-T6 Aluminum bearing housing with outer knurl 6061-T6 Aluminum offset spacers provide +/-2 degrees of caster adjustment FK 1" spherical bearings Applications: 2022+ BMW G8X (M3 and M4) Installation Instructions: SPL Front Caster Rod Bushings

This Part Fits:

Year Make Model Submodel
2021-2023,2025 BMW M3 Base
2021-2023,2025 BMW M3 Competition
2022-2023,2025 BMW M3 Competition xDrive
2021-2026 BMW M4 Base
2021-2026 BMW M4 Competition
2022-2026 BMW M4 Competition xDrive
2025 BMW M4 CS
2023 BMW M4 CSL

Product Details

Product Description
Front Caster Rod Bushings (CRB) replace the stock flexible rubber bushings with low friction, articulating Spherical Bearings eliminating bushing deflection and reducing friction. This maintains optimum suspension geometry under load to improve braking and handling feedback. Massive 1" sized FK Racing Bearings with self lubricating Teflon liners are used to ensure maximum performance and durability. Innovative CNC machined offset bearing spacers provide +/- 2 degrees of caster adjustment. OEM arms not included. Sold as a pair. Made in the USA. Caster Rod Bushings Features: 6061-T6 Aluminum bearing housing with outer knurl 6061-T6 Aluminum offset spacers provide +/-2 degrees of caster adjustment FK 1" spherical bearings Applications: 2022+ BMW G8X (M3 and M4) Installation Instructions: SPL Front Caster Rod Bushings

This Part Fits:

Year Make Model Submodel
2021-2023,2025 BMW M3 Base
2021-2023,2025 BMW M3 Competition
2022-2023,2025 BMW M3 Competition xDrive
2021-2026 BMW M4 Base
2021-2026 BMW M4 Competition
2022-2026 BMW M4 Competition xDrive
2025 BMW M4 CS
2023 BMW M4 CSL

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