Doorbusters Control Arm Bushings

Dial in your BMW’s handling like never before with this exclusive Doorbuster offer! Turner Motorsport’s Monoball Rear Trailing Arm Bushings (RTAB) deliver precision alignment, improved rear articulation, and race-inspired performance for the street or track. With a newly available sealed design, these bushings combine ultimate performance with long-lasting durability—making them the perfect upgrade for any BMW enthusiast.

Turner Monoball Rear Trailing Arm Bushings (RTAB)

Turner’s redesigned RTABs now feature a sealed bearing, protecting against contaminants like salt, grit, and road debris while eliminating the need for any lubrication or maintenance—ever. Drawing on over two decades of racetrack expertise, Turner brings precision, durability, and performance straight to your BMW.

Key Benefits:

Eliminates unwanted deflection, maintaining alignment and reducing wheel hop

Allows full trailing arm articulation with low-friction movement

Eliminates binding issues common in rubber or poly bushings

Street-ready: uses OE Lemforder sealed, greased ball joints for long life without increasing NVH

Design Features:

Housing: CNC billet 6061-T6 aluminum, type II anodized for corrosion resistance and strength

Bearing: OE Mercedes/Lemforder 2043520027 sealed ball joint

Bearing Inserts: CNC machined 303 stainless steel

Rebuildable: Rebuild Kit ES2695379 (x2) available

Turner Monoball Rear Upper Control Arm Inner Bushings – Race

For the ultimate in performance, Turner also offers monoball rear upper control arm bushings designed exclusively for track use. These race-grade bushings prevent side loading, allowing full control arm movement and unparalleled precision. While optimized for the track, daring enthusiasts willing to tolerate increased noise, vibration, and harshness may also consider them for street use.

Turner Motorsport continues to deliver high-quality BMW performance parts that combine durability, precision, and race-bred technology—allowing your BMW to perform at its full potential.

Tighten up and dial in your BMW's suspension with this limited-time Doorbuster package! This package includes the Turner Rear Adjustable Camber Arm Set (Street) and Turner Motorsport Control Arm Monoball Upgrade with housings (FCAB), allowing you to dial in your rear camber and tighten up the front control arms, improving your BMW's handling and driving feel.

REAR ADJUSTABLE CAMBER ARM SET - STREET
Top seller! The Turner Adjustable Rear Camber Arms: The Only Adjustable Arms Approved for Grand-Am Continental Tire Challenge Racing Series

Why you should use Turner Motorsport camber arms on your car:

• If you have a lowered car and have run out of adjustment with the stock camber arms.
• If you have a track car and are looking for increased camber adjustment, lightweight pieces, stronger components, and improved suspension handling
• Two bushing styles to meet your needs: solid rod-end for track-only use (See T#304098), or rubber bushing for mixed street/track use (approved by Grand-Am!)
• The high range of adjustment allows a full racecar setup or a heavily lowered car to maintain factory specifications.
• Only high quality and high strength materials and components are used
• Aluminum camber arms are designed as a lightweight component, thereby reducing wear and tear on other, more critical parts (rear subframe, control arm bushings, etc). Each camber arm weighs only 2.5 lbs making for a total of 5 lbs for both parts! Stock camber arms weigh 3 lbs each. We have seen competitor's arms that weigh twice as much!
• Hardcoat anodized aluminum, stainless steel turnbuckles, and stainless rod ends to all but eliminate corrosion from getting into the threads and making adjustment difficult.
• CNC-machined double shear design for ease of installation, high strength, and choice of outside bushing material. But we do suggest using with (outer bushing # 33326775551) for best performance.
• Easy adjustment - our main adjustment point is on the outside by the wheel so there is no need to work around the exhaust or subframe to adjust camber.
• All hardware included.

Installation Instructions:
Instructions for Bushing-End Style (TSU9940B77)

TURNER MOTORSPORT CONTROL ARM MONOBALL BUSHING UPGRADE (FCAB)

Our experience with spherical front control arm ball joints go back to those we designed and used in our IMSA E90 328i and E92 M3 racecars (GS class Champions in 2011).  We wanted to offer e30, e36, and e46 owners similar levels of handling precision and control for the track and street, but weren’t satisfied with the other options out there.  Instead of a Delrin bushing or unsealed spherical bearing alone, we selected an oversized sealed greaseable spherical monoball to offer unparalleled durability and precision, but designed a Delrin adapter sleeve to help isolate the added noise, vibration, and harshness that a full solid monoball bearing will have. While race-ready, our hybrid Delrin/monoball control arm bearings are more at home on the street than other kits that are advertised as “race-only” bearings. We did extensive street, autocross, and track testing to ensure the spherical bearing used in this bushing design excelled in each setting.

The stock rubber bushings, even those found in the M3, allow significant fore/aft movement of the front wheels to help absorb road impacts, especially when being pushed hard.  This soft flexible design maximizes daily driving comfort, but also allows considerable alignment change.  This unwanted deflection stands between you and a crisp, confidence-inspiring driving experience.  The advantage of a monoball bearing is that it will not deflect under load, eliminating all unwanted deflection while still allowing complete freedom of movement in the desired angles. What you get is superior steering precision with better handling from more consistent alignment and direct braking feedback, with exceptional service life.  Thanks to the Delrin insert and double lip seals, there's none of the extra noise or reduced service life often found on other spherical bearings.

In short, if you're seeking front control arm bushings that offer precise, predictable handling, crisper braking feel, with a long service life free from noise - look no further. We have you covered.

Watch to learn more about Turner Monoball Bushings

Features:

Bearing housing

• Manufactured using 6061-T6 blue anodized aluminum with a pre-installed grease fitting and grease distribution channels making this a serviceable design
• Knurling allows for a wide variance in lollipop dimension, although this particular SKU comes pre-installed, so you won't need to worry about that. Want to install your own? Click here. 

Bearing

• A high quality greaseable double lip sealed bearing with Delrin® inserts. Delrin® was chosen due to durability under pressure, while still soft enough to create a perfect play-free fitment on the control arm.
• Replaceable for infinite service life - no need to replace the entire mount in the event a bearing happens to fail.

Includes new hardware. Grease before installation and with each oil service with high quality Moly grease for maximum service life. Need a grease fitting tool?
Installation is relatively easy - see our instructions here.