Powerflex Black Series Front Lower Control/Thrust/Radius/Compression (Tension) Arm Rear Mount Poly Bushes for BMW 4 Series F32 F33 F36 – Arm-to-Chassis/Body Hydrobush Replacement Track Bushing Kit – PFF5-1901BLK

BMW F32 F33 F36 Front Thrust Arm-to-Body Polyurethane Bush Kit - Powerflex Black Series

Take the slack out of the front axle on your BMW 4 Series with this motorsport-ready bush kit from Powerflex. Built to deliver razor-sharp response and confidence under hard braking, these front lower arm rear bushes replace the soft, ageing hydrobushes and keep the arm positively located for precise geometry control on circuit and fast road use.

Part number: PFF5-1901BLK
Diagram reference: 2
Pack contents: 2 bushes
Replaces OEM: 31126852991, 31126852992

What it fits

BMW 4 Series F32 Coupe, F33 Convertible and F36 Gran Coupe front suspension - thrust arm to body position. Ideal for drivers chasing a tighter front end, improved steering accuracy and dependable stability when pushing on.

Why this upgrade

• 95A Black Series polyurethane for dedicated track and competition use
• Controls arm movement for cleaner turn-in and repeatable alignment under load
• Helps reduce brake shimmy, tramlining and vague on-centre feel caused by tired rubber
• Resistant to heat, oil and road contaminants for long-term performance
• Direct replacement bushing kit engineered for the OEM arm-to-chassis location

How it feels on the road and track

On our own builds and customer 4 Series cars, this kit delivers a more connected front end and predictable behaviour at speed. Expect crisper steering input, better front bite and consistent tyre contact on track days.

Common search terms

BMW F32 thrust arm bush, F33 thrust arm rear bush, F36 compression arm bush, front lower control arm rear mount, front wishbone rear bush kit, front arm rear bushing, hydrobush replacement BMW 4 Series, polyurethane suspension bushes UK, Powerflex PFF5-1901BLK, Black Series poly bush kit, BMW F3x handling upgrade, track day suspension bushes, chassis bushings performance.

Fitting service

Professional installation is recommended due to the need for correct pressing and torque settings. MJ Modifications in Warwickshire can supply and fit - request a quote: info@mjmodifications.co.uk.