Millway Motorsport Rear Trailing Arm RTAB Monoball/Uniball Spherical Bearing Kit for BMW 1M E82 & M3 E90 E92 E93 (E9X) - Solid Rose Joint Rear Control Arm Bushings - Inner & Outer Pair - Replaces OE 33326763092

Millway Rear Arm Spherical Conversion Kit for BMW 1M E82 and BMW M3 E90 E92 E93

Transform rear-end precision with Millway’s monoball replacement kit for the rear trailing arms. By replacing the factory rubber inserts with motorsport-grade spherical joints, this upgrade delivers crisp response, rock-solid toe control and repeatable alignment under load. Perfect for fast road, track day and competition builds where stability, traction and confidence matter.

Built around high quality spherical bearings housed in CNC machined aluminium with stainless spacers, this kit removes the flex and squirm associated with ageing rubber. Expect cleaner turn-in, more planted mid-corner behaviour and superb feedback from the rear axle on E82 1M and E9X platform M3 models.

• Direct swap for original rear arm bushes at both inner and outer positions
• Includes a matched pair for complete left and right side upgrade
• Motorsport monoball design for precise rear geometry control
• CNC machined aluminium housings with stainless steel spacers
• Ideal for performance road use, circuit work and time attack
• Pairs perfectly with Millway Uniball Outer Control Arm Bushings
• Cross-reference OE: 33326763092

Why upgrade

• Removes compliance from the rear guide arm for sharper, more consistent handling
• Improves toe stability and camber control during braking and cornering
• Enhances traction on corner exit and increases driver confidence
• Durable, track-proven construction for dependable performance

Vehicle compatibility

• BMW 1 Series M Coupe E82 (1M)
• BMW M3 E90 Saloon, E92 Coupe, E93 Convertible

Options

An eccentric outer version is available separately for additional alignment range if required.

Installation

Professional fitting recommended. For expert installation, contact MJ Modifications in Warwickshire for a quote: info@mjmodifications.co.uk.

Real-world feedback

We have installed these kits ourselves and our customers consistently report a tighter, more connected rear end with noticeably cleaner responses on both B-roads and track.

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