Turner Motorsport Front Control Arm Monoball Upgrade Kit

Comes with both OE curved and straight M arms as a complete assembled kit with bushings and hardware.
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Turner Motorsport
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Availability: Inventory On Order, ETA Aug 25, 2021
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Product Details

When you're looking for a control arm upgrade for your M3 this Turner Motorsport package is unrivaled, featuring their popular monoball bearing to replace the failure prone rubber bushing. The upgrades for this product aren't only that they will outlast everything else you can put on your car. These monoball off a much smoother, more responsive steering that allows the front control arm to articulate more naturally instead of fighting against the suspension causing deflection.

Stock rubber front control arm bushings are designed to allow significant fore/aft movement of the front wheels to help absorb road impacts.  This soft flexible design maximizes daily driving comfort and helps to add the “luxury” feeling to your BMW, but it is far from ideal for the performance or racing enthusiast that is looking for optimal handling and braking performance.  Being a bonded rubber bushing that is constantly twisting and deflecting when in use, stock rubber bushings really take a beating and often fail prematurely, resulting in further degraded handling, braking shimmy or even clunking felt under your feet.

In the past, the only upgrade option to improve handling of your E46 M3 was to replace the stock rubber with poly bushings, or delrin bushings that wear prematurely and are not serviceable or rebuild-able.  While well-designed poly bushings can vastly improve handling characteristics and offer good road feel with minimal increase to NVH, they are still a compromise when it comes to ultimate handling and braking performance.

Introducing the new Turner Front Control Arm Spherical Bearings!  The Turner engineering team set out to design a no-compromise solution that requires no modification and offers instantaneous cornering and braking response.  Our control arm bearings utilize a unique grease-able spherical bearing that is both serviceable and replaceable, with integrated dust seals to help keep dirt and moisture out.  This bearing offers considerable improvement in both precision and durability compared to other unsealed poly and delrin bushing inserts previously available, which can wear prematurely due to contamination.  The bearing assembly utilizes the highest quality materials, precision machining quality, and components to ensure a perfect fit and longest lasting component life possible.

The result is the ultimate in terms of low friction, no binding, and no unwanted deflection, as well as exceptional steering precision, turn-in response, and direct braking feedback with minimal increase in NVH.  These spherical bearings are a must have for any track car, but are also completely street-able and are a great upgrade for any enthusiast that enjoys spirited driving.


  • Paired with Lemforder control arms
  • Made in America


- Extremely robust, grease-able, double lip sealed spherical bearing (Rated for 20,000lbf Dynamic, 90,000lbf Static). 


- 6061-T6, anodized housing with needle grease zerk for easy maintenance. 

- In house designed knurled OD to provide the perfect fit for the wide range of housing diameters among brands. 

Bearing Insert Arm adapter

- Precision CNC machined Delrin, providing a tight fit between the bearing and the control arm. 


- Instant, crisp steering and braking response.

- Easy to maintain, long lasting performance. 

- Improved road feel without undesirable NVH.

This Part Fits the Following Vehicles

Make Model Submodel Engine
BMW E82 1 M Coupe N54 3.0L
BMW E82 128i N52 3.0L
BMW E82 135i N54 3.0L
BMW E82 135i N55 3.0L
BMW E90 325i N52 3.0L
BMW E90 328i N52 3.0L
BMW E90 330i N52 3.0L
BMW E90 335d M57 3.0L
BMW E90 335i N54 3.0L
BMW E90 335i N55 3.0L
BMW E90 M3 S65 4.0L
BMW E91 328i N52 3.0L
BMW E92 328i N52 3.0L
BMW E92 335i N54 3.0L
BMW E92 335i N55 3.0L
BMW E92 335is N54 3.0L
BMW E92 M3 S65 4.0L
BMW E93 328Ci All
BMW E93 328i N52 3.0L
BMW E93 335i N54 3.0L
BMW E93 335i N55 3.0L
BMW E93 335is N54 3.0L
BMW E93 M3 S65 4.0L
BMW Z4 sDrive28i N20 2.0L
BMW Z4 sDrive30i N52 3.0L
BMW Z4 sDrive35i N54 3.0L
BMW Z4 sDrive35is N54 3.0L
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.


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Manufacturer names and/or part numbers are used only for identification purposes.

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