PFR5-504-13H - PowerFlex Front Sway Bar Bushing - 13 Mm - E39
PowerFlex Front Sway Bar Bushing - 13 Mm - E39
In professional motorsport, chassis predictability and geometric stability are non-negotiable. Standard factory rubber bushings are designed for low-frequency compliance, but under dynamic loading, they suffer from significant deflection. This deflection distorts your suspension geometry, slows down anti-roll bar transition times, and masks critical feedback from the rear axle.
Engineered for track-vetted performance with a classic aesthetic, the Powerflex Rear Anti-Roll Bar Bushing (13mm) is the definitive chassis upgrade for premium classic and modern-classic BMW platforms.
Factory rubber bushings are inherently designed for generic road insulation, leading to excessive deflection, slow anti-roll bar articulation, and unpredictable body roll under hard cornering loads. This Heritage Collection kit swaps the soft OEM rubber for Powerflex’s advanced, elite-engineered polyurethane formulation. Crucially, it is finished in a discreet dark grey—providing race-tier chassis control while preserving a concours-ready, original equipment appearance.
Satisfy the pure racer and the classic purist in one fell swoop.
Key Performance Benefits
Eliminated Deflection: Maximizes the efficiency of your 13mm rear anti-roll bar by anchoring it firmly to the chassis, transferring cornering loads instantly rather than binding or compressing.
Sharper Turn-In & Lateral Stability: Minimizes dynamic alignment changes during high-speed transitions, keeping the rear end predictable, stable, and flat through apexes.
The Heritage Aesthetic: Features the exact same advanced durometer material as Powerflex's acclaimed performance street line, but molded in a classic dark grey colorway that seamlessly mimics factory rubber.
Race-Proven Durability: Unlike standard rubber which quickly degrades, softens, and cracks under environmental and mechanical stress, this compound remains chemically impervious to oils, road salt, and ozone.
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
33551093663
PFR5-504-13
Product Q&A
Lifetime Replacement
This product is not eligible for Lifetime Replacement
Fits These Cars
MAKE
MODEL
SUBMODEL
ENGINE
Special Fitment Notes
BMW
E39
525i
M54 2.5L
Use vehicle selector to confirm fitment
BMW
E39
528i
M52 2.8L
Use vehicle selector to confirm fitment
BMW
E39
530i
M54 3.0L
Use vehicle selector to confirm fitment
BMW
E39
540i
M62 4.4L
Use vehicle selector to confirm fitment
BMW
E39
M5
S62 5.0L
Use vehicle selector to confirm fitment
BMW
E39
525i
M54 2.5L
Use vehicle selector to confirm fitment
BMW
E39
528i
M52 2.8L
Use vehicle selector to confirm fitment
BMW
E39
530i
M54 3.0L
Use vehicle selector to confirm fitment
BMW
E39
540i
M62 4.4L
Use vehicle selector to confirm fitment
*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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