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Powerflex

Powerflex Black Series Adjustable Caster/Castor Front Radius Arm to Chassis Bush for BMW F20 F21 F22 F23 F30 F31 F32 F33 F34 F36 (1/2/3/4 Series) – PFF5-1901GBLK

Powerflex Black Series Adjustable Caster/Castor Front Radius Arm to Chassis Bush for BMW F20 F21 F22 F23 F30 F31 F32 F33 F34 F36 (1/2/3/4 Series) – PFF5-1901GBLK

£161.88
£161.88 £161.88
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Powerflex PFF5-1901GBLK Black Series Caster-Adjustable Front Lower Arm Rear Bushings for BMW F-Series

Transform steering response and front-end stability on your BMW with these motorsport-grade polyurethane bushings. The Powerflex Black Series PFF5-1901GBLK kit replaces the rear mount of the front lower control arm, controlling deflection under load so the wheels track true when you turn in and brake hard. Made from a 95 Shore A compound that is over 200 percent firmer than tired factory rubber, they deliver precise alignment control and a more connected drive on fast road and track.

PFF5-1901GBLK features in-situ caster adjustment of plus or minus 0.75 degrees, letting you fine-tune steering feel and increase dynamic negative camber on turn-in for improved tyre contact and corner speed. We have installed these on numerous F-series cars and customers consistently report sharper turn-in, clearer feedback and greater confidence at pace.

Key advantages

  • Black Series polyurethane for track-focused durability and geometry control
  • Approx. 200 percent stiffer than OE rubber to reduce unwanted arm movement
  • On-car caster castor adjustment by ±0.75 degrees for alignment optimisation
  • Enhances steering precision, braking stability and front axle grip
  • Direct-fit replacement for the front lower control arm rear mount
  • Also known as tension strut bush, thrust arm bush, radius rod to body mount, front wishbone rear bush

Part details

Part number: PFF5-1901GBLK

Location on car: Front axle - lower control arm rear position - arm to chassis

Durometer: 95 Shore A Black Series

Adjustment range: ±0.75 degrees caster castor

OEM cross references

31126855743, 31126855741, 31126855742

Looking for a fixed version with no adjustment? See PFF5-1901BLK.

What you get

2 x bushes supplied as a pair to service one car.

Diagram reference

Ref: 1

Powerflex PFF5-1901GBLK Black Series caster adjustable front lower control arm rear bush BMW F20 F21 F22 F23 F30 F31 F32 F33 F34 F36

Vehicle fitment

  • BMW 1 Series F20 F21 pre-LCI and LCI
    • 114d, 114i, 116d, 116 ed, 116i, 118d, 118dX, 118i, 120d, 120dX, 120i, 125d, 125i, M135i, M135iX, M140i, M140iX
  • BMW 2 Series F22 F23 pre-LCI and LCI
    • 218d, 218i, 220d, 220dX, 220i, 225d, 228i, 228iX, 230i, 230iX, M235i, M235iX, M240i, M240iX
  • BMW 3 Series F30 F31 pre-LCI and LCI
    • 316d, 316i, 318d, 318dX, 318i, 320d, 320d ed, 320dX, 320i, 320i ed, 320iX, 325d, 328d, 328dX, 328i, 328iX, 330d, 330dX, 330e, 330i, 330iX, 335dX, 335i, 335iX, 340i, 340iX, ActiveHybrid 3
  • BMW 3 Series F34 Gran Turismo pre-LCI and LCI
    • 318d, 320d, 320dX, 320i, 320iX, 325d, 328i, 328iX, 330d, 330dX, 330i, 330iX, 335dX, 335i, 335iX, 340i, 340iX
  • BMW 4 Series F32 F33 F36 pre-LCI and LCI
    • 418d, 418i, 420d, 420dX, 420i, 420iX, 425d, 428i, 428iX, 430d, 430dX, 430i, 430iX, 435dX, 435i, 435iX, 440i, 440iX

Fitment help

We verify compatibility before dispatch. Add your UK registration or last 7 of your VIN at checkout and we will confirm it suits your exact model including xDrive and M Sport variants.

Professional installation

Prefer expert fitting and alignment setup? Book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

Tip: a four-wheel alignment is recommended after bushing replacement to make the most of the caster adjustment.

Why enthusiasts choose this upgrade

  • Poly bush precision with minimal deflection under cornering and braking
  • Improved steering feel and consistency lap after lap
  • Ideal for fast road, track day and club sport builds seeking better front axle bite
  • Robust construction engineered for repeated hard use

Search-friendly terms

Powerflex PFF5-1901GBLK, Black Series poly bush kit, polyurethane bushings BMW F chassis, front lower control arm rear bushing, front wishbone rear mount, radius rod bush, thrust arm bush, tension strut to body mount, caster castor correction bush, caster adjustable bushes, alignment correction kit, handling upgrade BMW 1 Series 2 Series 3 Series 4 Series, BMW F20 F21 F22 F23 F30 F31 F32 F33 F34 F36 bushings, BMW M135i M140i M235i M240i 335i 340i 435i 440i, fast road suspension, track day suspension, steering response upgrade, improved turn in, camber gain on lock, performance suspension bushes, F-series chassis upgrade, polybush BMW, xDrive compatible, motorsport bushings.

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