SPL BMW E9X E8X F8X Adjustable Front Caster Rod Monoball Bushings — Part Number: SPL CRB E9X
Upgrade the front end of your BMW with SPL Parts adjustable front caster rod monoball bushings. Designed for serious performance on fast road and track, these spherical bearing caster bushings replace the soft factory rubber in the tension strut or thrust arm to eliminate bushing deflection, improve braking stability, sharpen steering response and maintain precise alignment under load. If you are searching for BMW front control arm bushings, tension strut bushings, thrust arm bushings, caster rod bushings or a monoball conversion for E9X, E8X and F8X platforms, this is the motorsport-proven solution.
Why choose SPL caster rod monoballs
- Articulating spherical bearings reduce friction and stop the OEM rubber bushing from flexing, giving direct steering feel and consistent geometry during hard braking and cornering.
- CNC machined offset spacers allow easy front caster adjustment for dialling in turn-in, straight-line stability and tyre contact patch.
- Massive 1 inch FK Racing Bearings with self lubricating Teflon liners deliver durability and smooth, quiet articulation on road and track.
- Precision 6061-T6 aluminium bearing housings with a knurled exterior ensure a secure press fit in the OEM arm.
- Made in the USA to a motorsport standard and sold as a matched left and right pair.
We have used this kit ourselves and our customers love the transformation in steering precision, braking feedback and overall confidence. It is a proven upgrade for track days, time attack, drifting and spirited fast road driving.
Fitment and compatibility
Fits the front caster rod or tension strut position on the following BMW models:
- BMW 1 Series E82 E88 — M and non M (2008 onward)
- BMW 3 Series E90 E91 E92 E93 — M and non M (2006 to 2013)
- BMW F80 M3 (2014 onward)
- BMW F82 F83 M4 (2014 onward)
- BMW F87 M2 (2016 onward)
Will not fit xDrive or AWD vehicles.
What is included
- Two SPL caster rod monoball bushing assemblies with offset spacers — sold as a pair
- OEM arms not included
Installation
Professional pressing tools and alignment are required. We recommend professional fitting and a post-install wheel alignment.
Prefer us to install it for you? Nforcd offers expert fitting in Warwickshire. Request a quote at Sales@nforcd.com.
Download the SPL installation guide
Key specifications
- Part number: SPL CRB E9X
- Bearing: FK 1 inch spherical with self lubricating Teflon liner
- Housing and spacers: 6061-T6 aluminium, CNC machined
- Adjustable front caster via offset spacers
- Made in the USA
Popular search terms
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