PFF5-4001G – Front Radius Arm Bush Caster Adjustable – M2 M3 M4

The Powerflex PFF5-4001G Front Radius Arm to Chassis Bush (Caster Adjustable) is a Fast Road polyurethane upgrade for the BMW F8X platform, including the M2, M3 and M4. Designed to replace the soft OEM rubber bush, this adjustable version allows fine-tuning of caster angle for improved steering feel, better turn-in and enhanced front-end grip — all while maintaining sensible NVH levels for daily use.

SKU: PFF5-4001G
Position: Front Radius Arm → Chassis Bush
Application: Fast Road / Performance
Fitment: F8X M2, M3, M4 ONLY

Key Features

Adjustable Caster Offset

– Allows precise front geometry tuning
– Improves turn-in, steering feel and mid-corner stability
– Helps maintain tyre contact patch under load

Fast Road Polyurethane

– Stiffer than OEM rubber
– Reduces unwanted arm flex and movement
– Maintains comfort suitable for everyday driving

Sharper Front-End Response

– Provides a tighter, more connected steering feel
– Improves braking stability and weight transfer
– Enhances confidence during spirited driving

Durable Performance Construction

– Long-lasting alternative to OEM rubber
– Resistant to oil, heat and road contaminants
– Ideal for tuned or fast-road F8X cars

Benefits

The PFF5-4001G bush provides a more planted and responsive front end on the M2/M3/M4. Steering becomes more predictable, turn-in sharper, and the car maintains better stability during high-load cornering. Perfect for drivers who want geometry adjustability without committing to full motorsport stiffness.

Fitment

Suitable for:
– BMW M2 (F87) – 2016–2020
– BMW M3 (F80) – 2014–2018
– BMW M4 (F82/F83) – 2014–2020

SKU: PFF5-4001G
Position: Front Radius Arm → Chassis Bush
Fits: F8X ONLY

Installation Notes

– Press tools required for removal of OEM bush
– Wheel alignment recommended after installation
– NVH increase minimal vs Black Series
– Professional fitting advised

About Powerflex

Powerflex Fast Road components deliver enhanced handling precision, improved response and longer life than OEM, while still retaining comfort for daily road use. Perfect for enthusiasts seeking sharper performance from their F8X M-car.