When competing at the limit, standard factory rubber compounds are a liability. Over time and under heavy lateral loads, stock bushings deflect, causing unpredictable geometry shifts, delayed transient response, and a vague rear-end feel.
Engineered strictly for the track, the Powerflex Black Series Rear Anti-Roll Bar Bushing (18mm) is a zero-compromise chassis upgrade designed to maximize rear-end stability and precision.
Factory rubber bushings are designed for street comfort, meaning they deflect heavily under load. On the race track, this deflection causes unpredictable geometry shifts, delayed steering response, and mid-corner instability. The Black Series replaces that compliant rubber with a specialized 95A durometer polyurethane compound, delivering an 80% increase in stiffness over OEM components. By locking the 18mm rear anti-roll bar firmly in place, this upgrade ensures instantaneous sway bar activation and flat, predictable cornering.
Key Performance Benefits
Maximum Lateral Control: Minimizes body roll and keeps the rear tire contact patch optimally flat against the tarmac during high-speed cornering.
Instantaneous Response: Eliminates the "slop" and delayed transition time typical of factory rubber, allowing for immediate chassis rotation and sharper feedback.
Track-Proven Durability: The 95A durometer material resists advanced degradation from track grime, extreme heat, and severe mechanical loads, outlasting standard race rubber.
Advanced Material Engineering: Includes premium, corrosion-resistant stainless steel sleeves and specialized high-load lubricants to ensure smooth operation under load without binding.
Fitment Note: We recommend measuring your rear factory or aftermarket sway bar to determine which size of bushings are required for your vehicle. Sway bar sizes can differ depending on factory suspension packages and aftermarket sway bar brands.
Prop 65 Warning
Cross Reference
33556797888
PFR5-6013-18
Product Q&A
Lifetime Replacement
This product is not eligible for Lifetime Replacement
Fits These Cars
MAKE
MODEL
SUBMODEL
ENGINE
Special Fitment Notes
BMW
F07
535i
N55 3.0L
For Vehicles with M Sports Suspension
BMW
F07
535i xDrive
N55 3.0L
For Vehicles with M Sports Suspension
BMW
F07
550i
N63 4.4L
For Vehicles with M Sports Suspension
BMW
F07
550i xDrive
N63 4.4L
For Vehicles with M Sports Suspension
*The above product applications have been written by Turner Motorsport. All
warranties, product application, fitment, and performance are the responsibility of Turner Motorsport.
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