Powerflex PFF5-6101G Caster Offset Front Tension Strut (Radius Arm) to Chassis Polyurethane Bushes (Pack of 2) for BMW 5 Series F10 F11 xDrive - Replaces 31126777653

Front Tension Strut to Body Poly Bush Kit with Caster Gain for BMW 5 Series F10 F11 xDrive

Unlock sharper steering, stronger front-end bite and a more planted feel from your BMW 5 Series xDrive with this polyurethane bushing upgrade. Part number PFF5-6101G is designed for the front tension strut, also known as the thrust arm or front lower control arm rear position, where it mounts to the chassis. By increasing caster, this kit delivers crisper turn-in, improved straight-line stability and better tyre contact on lock without sacrificing day-to-day comfort.

Part number: PFF5-6101G
Location: Tension strut to chassis mounting, caster-increase version
Vehicle fitment: BMW 5 Series F10 and F11 xDrive models
OE reference: Replaces BMW 31126777653
Pack size: 2 bushes
Diagram ref: 1

What you will feel

• 6 mm fixed offset providing around 0.5° of extra caster per side for more direct steering
• Greater high-speed composure and confidence under heavy braking
• Increased negative camber on turn for stronger front-end grip and reduced understeer
• Cleaner geometry control that helps reduce tramlining and uneven tyre wear
• Durable polyurethane resists oil, heat and ageing far better than rubber
• Backed by a lifetime warranty for long-term peace of mind

Why upgrade this mounting

The factory rubber insert in the thrust arm can soften and allow the wheel to move fore and aft under load. This can dull steering response and cause instability over bumps or during braking. The PFF5-6101G polyurethane bush keeps alignment true, so the front axle tracks straight, the wheel maintains a stronger contact patch and the car responds consistently. It is a proven fast-road and track-day friendly upgrade that still works brilliantly on UK roads.

Real-world feedback

We have fitted this kit to our own cars and many customer vehicles. Drivers report immediate improvements in steering precision, stability and confidence without unacceptable NVH. It is one of the highest value handling upgrades for the F10 and F11 xDrive platform.

Fitting and alignment

Professional installation is recommended, followed by a full four-wheel alignment to maximise the caster benefit. For expert fitting, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Looking for standard geometry

If you want a non-offset option that retains factory caster, choose PFF5-6101.

Search terms our customers use

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