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

If you're looking to get the most out of your 2021-2024 BMW M4's suspension, these adjustable caster bushings from SPL Parts are a solid upgrade. They replace the stock rubber bushings in your caster rods with low-friction spherical bearings. This is a big deal because those stock rubber bushings can flex under load, which messes with your suspension geometry. By eliminating that flex, you get a more consistent alignment, which directly translates to improved braking and better feedback from the road.

What makes these stand out is the use of massive 1-inch FK Racing Spherical Bearings. These aren't your average bearings; they have self-lubricating Teflon liners built-in, meaning they're made for serious performance and long-lasting durability. The housings are CNC machined from 6061-T6 aluminum, and they even have an outer knurl for a solid grip. Plus, the kit includes innovative CNC machined offset spacers. These spacers let you dial in about +/- 2 degrees of caster adjustment, giving you the ability to fine-tune your front-end alignment for optimal handling. Keep in mind that the original OEM caster arms are not included, and these are sold as a pair.

These caster bushings are proudly made, engineered, and assembled right here in the USA. Getting the alignment dialed in is crucial for both performance driving and just getting the most out of your car on the street. With these SPL Parts bushings, you're getting a well-built component that helps maintain precise suspension geometry, especially under hard braking and cornering.