SPL Parts Rear Lower Control Arm (LCA) Knuckle Bushing - BMW E8X/E9X 1/3 Series & F80/F82/F83 M3/M4 - Teflon-Lined FK Spherical Bearing - Pair | SPL RLCB E9X

Rear Upright Monoball Conversion for BMW E8X, E9X and F8X by SPL Parts

Part number: SPL RLCB E9X

Dial in laser sharp rear axle control with SPL Parts’ knuckle-side lower arm conversion. This replacement for the factory rubber bush at the rear wheel carrier swaps compliance for precision using a PTFE lined FK uniball. Expect rock solid geometry control, crisp response and repeatable alignment on fast road, track day, time attack and drift cars while staying composed for everyday use.

• FK Bearings USA PTFE lined spherical joint for ultra low friction articulation and immediate feedback
• Stabilises camber and toe under braking, cornering and acceleration for predictable handling and improved tyre wear
• Reduces binding through the suspension range for better compliance, traction and stability over bumps
• Large format bearing chosen for durability with minimal added NVH
• Precision CNC machined 6061 T6 aluminium housing for an exact interference fit
• Sold as a pair for both rear corners
• Engineered and made in the USA by SPL Parts

Why upgrade

Factory rubber bushes flex and introduce unwanted toe steer and geometry change. This monoball conversion locks the lower arm to the hub carrier with a low friction rose joint so the multi link rear end works as intended. The result is a planted rear axle, better traction on power and repeatable setup that lets your alignment stay where you set it.

Ideal use

• Fast road and canyon driving
• Track days and time attack
• Drift builds seeking consistent rear end behaviour

Compatibility

BMW

• All E82 and E88 1 Series M Version 2008 to 2013
• All E90, E91, E92, E93 3 Series M Version 2006 to 2013
• F80 M3, F82 and F83 M4

Fitting and alignment

Professional installation and a four wheel alignment are strongly recommended to maximise performance and tyre life. MJ Modifications in Warwickshire can supply and install. Request a fitting quote at info@mjmodifications.co.uk.

Proven by us and our customers

We run SPL components on our own builds and customer cars. Feedback is consistently the same. A tighter rear end, better traction on corner exit and geometry that stays consistent session after session.

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