Turner Motorsport Rear Upper Control Arm Monoball/Spherical Bearing Bush Conversion Kit for BMW M2 M3 M4 F80 F82 F83 F87 (F8X) - Rear Camber Link/Wishbone Ball Joint Upgrade, Rubber Bush Replacement

Sharper rear-end response for BMW F80 F82 F83 F87

Eliminate vague rear axle movement and unlock precise handling with this Turner rear upper link spherical joint conversion. This upgrade replaces the soft, fluid-filled rubber element in the rear upper arm with a sealed OEM BMW ball joint housed in a beautifully engineered aluminium body. The result is crisper turn-in, better braking feedback, more consistent geometry under load and improved tyre wear on both fast road and track day builds.

We fit these on customer cars and our own projects, and the difference in stability and confidence is immediate. If you are chasing tighter alignment control, reduced squirm on power, and repeatable lap-after-lap performance without adding unwanted noise or harshness, this is the smart suspension upgrade for the F8X platform.

Why enthusiasts choose this rear upper arm bearing kit

• Transforms rear-end precision with minimal NVH increase
• Stops unwanted toe and camber change for stable corner exits
• Gives direct braking feel and faster steering reaction
• Maintenance free thanks to a sealed and greased joint
• Perfect for fast road, track days and club motorsport

Engineered for durability and easy installation

• Sealed BMW ball joint for low friction, no bind suspension travel and long service life in all weather conditions
• 6061-T6 anodised housing for excellent corrosion resistance
• Knurled outer diameter ensures a secure press fit and long term stability
• CNC machined 304 stainless inserts provide a precise interface with the suspension arm
• No permanent modification required to the arm, designed as a direct press-in replacement for the compliant rubber element

Fitment

For BMW F8X chassis including F80 M3, F82 M4, F83 M4 Convertible and F87 M2. Rear upper arm position only. Ideal alternative to rubber bushes for drivers seeking a spherical bearing style feel with OEM reliability.

Real world benefits

• Cleaner mid-corner balance and confidence under heavy braking
• Reduced wheel shimmy and tramlining compared to tired rubber
• More even tyre wear through improved alignment stability
• Consistent performance for street and circuit use

Professional installation available

Want it fitted correctly the first time? Book installation with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk. We supply, press and align for a complete, worry-free upgrade.

Keywords customers use: rear upper arm bush replacement, rear wishbone upgrade, spherical bearing conversion, rear axle joint kit, BMW M3 M4 M2 suspension bushes, rear camber link joint, solid bush alternative, track suspension upgrade, precision handling kit.