Powerflex Black Series 21mm Rear Anti Roll Bar (ARB) | Sway/Stabilizer/Stabiliser Bar Mount/Clamp Bush/Bushing for BMW X5 E70 & X6 E71/E72 Non-ARS Polyurethane PFR5-1413-21BLK – Replaces 33556772082

Rear stabiliser bar poly bush kit 21 mm for BMW X5 X6 E70 E71 E72 - Powerflex Black Series

Unlock sharper handling and rock-solid rear axle control on your BMW SUV with the Powerflex Black Series 21 mm rear stabiliser bar bush kit. Built from motorsport-grade 95A polyurethane, this upgrade replaces tired factory rubber to give you crisper turn-in, noticeably less body movement and consistent geometry under load. Ideal for fast road, track days and heavy-duty performance use.

Why enthusiasts choose this uprated bush kit

• High-durometer 95A polyurethane for maximum control of suspension alignment
• Reduced flex compared with OEM rubber for improved rear-end stability and confidence
• Designed for demanding use cases including circuit work and spirited B-road driving
• Direct swap for 21 mm rear bar on models without Active Roll Stabilisation
• Resistant to oil, road grime and salt for long service life

We run these bushes on our own builds and customer cars, and feedback is consistently excellent. Expect a tighter, more planted feel from the back end, cleaner transitions and better grip on corner exit. If you are chasing a dependable poly bush solution for your BMW X5 or X6, this is a proven fit-and-forget upgrade.

Fitment and specs

• Location: Rear stabiliser bar mounting positions
• Bar diameter: 21 mm
• Compatibility: Vehicles without Active Roll Stabilisation ARS non-active bar only

Chassis compatibility:

• BMW X5 E70 2006 to 2013
• BMW X6 E71 2007 to 2014
• BMW X6 ActiveHybrid E72 2008 to 2011

Cross reference

• OEM reference: 33556772082

What is included

• 2 x rear bar mounting bushes one pair required per vehicle

Part number

PFR5-1413-21BLK

Check before you buy

We can confirm fitment against your registration UK or the last 7 digits of your VIN. Add your vehicle details at checkout and we will verify the correct diameter and application before dispatch.

Professional fitting and support

Need installation We offer fitting at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote, workshop availability and friendly advice on pairing this upgrade with other suspension improvements.

Helpful buying notes

• Measure your rear bar to confirm 21 mm before ordering
• Suitable only for non-ARS non-active rear bars
• Torque brackets to manufacturer specification and lubricate bush inner faces as per guidance

Search terms our customers use

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