Powerflex PFF5-4001G Black Series Caster Offset Front Radius/Control Arm Rear Bushes for BMW M4 F82 F83 (F8x) – Tension Strut/Wishbone to Chassis Polyurethane Lollipop Bush Kit

BMW M4 F82 F83 Front Tension Strut to Body Polyurethane Bushing Set – PFF5-4001G

Transform front-end precision on your F8x M4 with this uprated polyurethane bushing pair from Powerflex. The PFF5-4001G Black Series set is a geometry-correction solution for the front lower arm rear mount, delivering crisper turn-in, better stability under braking and a more connected steering feel on fast road and track.

Part number: PFF5-4001G

What it does

• Fixed 5 mm offset adds roughly ±0.5 degrees of additional caster per side for straighter tracking and enhanced steering feedback
• Encourages camber gain as you apply lock, helping the tyre maintain a stronger contact patch mid-corner
• Black Series polyurethane is approximately 18% stiffer than ageing OE rubber, cutting unwanted movement during heavy braking and hard cornering
• Keeps alignment true so the car feels predictable and confidence-inspiring lap after lap
• Improves front-end response without a harsh ride and helps protect tyre wear
• Backed by a lifetime warranty for long-term peace of mind

Why enthusiasts choose this upgrade

We run this exact bushing set on our own builds and our customers love the difference. Expect sharper steering, repeatable handling and a more planted feel from the front axle compared with tired factory bushes. It is a proven motorsport-grade solution for anyone chasing precise geometry on an F82 or F83.

Fitment

BMW M4 F82 Coupe and F83 Convertible. Front lower wishbone rear mount to chassis, also known as the tension strut or lollipop bush. Caster-increasing version.

What’s in the box

• Diagram reference: 1
• Quantity: 2 bushes

Replaces OE references

31122284531, 31122284532, 31122283579

Notes

• PFF5-4001G is the caster-enhanced option to improve steering stability and geometry on turn
• For a non-offset alternative use PFF5-4001
• A full four-wheel alignment is recommended after installation

Professional installation

Need it fitted? Book with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk

Why polyurethane for the front axle

Uprated polyurethane resists compression and deformation far better than soft rubber, controlling arm movement so your M4’s suspension geometry stays where it should. The result is more grip, cleaner feedback through the wheel and consistent braking and cornering performance.

Search terms people use

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