Powerflex - BMW Front Radius Arm F8x M2, M3, M4 Conversion Bush (F80/F82/F83)

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Description

BMW Front Radius Arm F8x M2, M3, M4 Conversion Bush (F80/F82/F83) is Powerflex part PFF5-4901BLK. This listing has been reviewed to make the component, mounting position and intended application easier to identify before ordering.

Vehicle/application references: 2 Series, 3 Series, 4 Series, BMW, M2 COMPETITION (F87C), M3 (F80), M4 (F82 & F83).

Product details

Powerflex - BMW Front Radius Arm F8x M2, M3, M4 Conversion Bush (F80/F82/F83)

PFF5-4901BLK Front Radius Arm F8x M Conversion Bush has been designed to fit the original equipment "M" radius arms but accommodates the wider subframe fitted to non-M cars. This new bush option allows older arms with worn bushes to be repurposed, saving the cost of buying new BMW arms at around £150 to £200 each. Seen more as a track/motorsport upgrade, these parts are available exclusively through our Black Series and made in our Black 95A material, paired with stainless-steel inner sleeves and CNC-machined outer shells for strength and improved load distribution. The increase in caster provided by this conversion and the fitment of our bush allows for greater in-corner camber gain, with improved front-end grip and turn-in. This makes it an ideal upgrade for any tuned M'lite looking to head out on track, and it serves as great accompaniment for our PFF5-1902GBLK Camber Adjustable Bushes.  

OEM Part Number: Arm = 31122284531 / 31122284532

      Compatibility:

      • BMW F87C M2
      • BMW F80 M3
      • BMW F82/83 M4

      Before ordering

      Confirm the exact chassis, drivetrain, original component and mounting position before purchase, particularly on modified cars. Powerflex Road, Purple/Fast Road and Black Series parts can differ in stiffness and intended use. Polyurethane or uprated mountings can increase transmitted noise and vibration. There is no blanket fitment guarantee.

      Browse the full Powerflex range for related bushes, inserts and mounting upgrades.

      Warranty, Shipping and Returns

      Products are supplied with the applicable manufacturer warranty. We offer UK and worldwide shipping. Please refer to the live availability information and our shipping and returns policies before ordering. Contact us if you need to confirm compatibility, intended use or any product-specific conditions.

      Finance Options

      Available payment options and current terms are shown at checkout. Instalment options depend on the provider and eligibility. Please review the terms displayed before confirming your payment.

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      Specifications
      Brand
      Powerflex
      Product type
      Bushes
      SKU:
      PFF5-4901BLK
      Vehicle make
      BMW
      Vehicle model
      M3, M4, and M2
      Vehicle variant
      F80, F82, and F83

      Powerflex questions answered

      Here' some of our most asked questions about Powerflex.

      What does this Powerflex bush do?

      Powerflex bushes are designed to replace the softer original rubber bushes fitted from factory. The aim is to reduce unwanted movement in the suspension, drivetrain or chassis, helping the car feel sharper, more stable and more responsive.

      Depending on where the bush is fitted, it can improve steering feel, braking stability, gear changes, traction or overall handling.

      Is this Powerflex bush suitable for road use?

      Yes, many Powerflex bushes are suitable for road cars, especially if you want a more direct and controlled feel without going too extreme. They are a popular upgrade for fast road cars, daily drivers and weekend cars where the original rubber bushes are worn or too soft.

      For more focused track or motorsport use, Powerflex Black Series options may be better suited where available.

      Will Powerflex bushes make my car harsher?

      You may notice a slightly firmer or more connected feel, especially when replacing larger suspension or drivetrain bushes. That said, most road-focused Powerflex bushes are designed to improve control without making the car uncomfortable.

      More focused bushes, particularly motorsport-style options, can increase noise, vibration and harshness, so it’s worth choosing the right version for how you use the car.

      What is the difference between Powerflex Road Series and Black Series?

      Powerflex Road Series bushes are designed for road and fast road use. They usually offer a good balance between improved handling, durability and comfort.

      Powerflex Black Series bushes are more focused and are generally aimed at track, competition or heavily modified cars. They can offer a more direct feel but may also increase noise and vibration compared with standard rubber or Road Series bushes.

      Why should I replace my original bushes?

      Factory rubber bushes wear over time. As they get older, they can allow extra movement, which may lead to vague steering, poor alignment control, knocking noises, uneven tyre wear or a less precise feel from the car.

      Replacing worn bushes with Powerflex upgrades can help restore control and improve the way the car feels, especially on performance cars used for fast road or track driving.

      Are Powerflex bushes worth it?

      Yes, especially if your original bushes are worn or you want a sharper, more controlled setup. They are a popular upgrade because they can improve the feel of the car without needing to change major components.

      They’re particularly worthwhile on performance cars where suspension feel, alignment stability and chassis response matter.

      Do I need to replace bushes in pairs?

      In most cases, yes. It’s best practice to replace bushes in matching pairs across the same axle or suspension position. This helps keep the car balanced and avoids one side feeling tighter or newer than the other.

      If you’re unsure what should be replaced together, get in touch before ordering and we’ll help point you in the right direction.

      Is fitting Powerflex bushes difficult?

      Some Powerflex bushes are straightforward to fit, while others require more time, tools or workshop equipment. Many original bushes need to be pressed out before the new bushes can be fitted.

      If you’re not confident with suspension work, we’d recommend having them fitted by a professional garage.

      Do I need a wheel alignment after fitting Powerflex bushes?

      For suspension-related bushes, yes, we’d strongly recommend a wheel alignment after fitting. Changing bushes can affect geometry, and a proper alignment helps make sure the car drives correctly, handles well and doesn’t wear tyres unevenly.

      For drivetrain bushes or inserts, alignment may not be required, but it depends on the part being fitted.

      Will these bushes fit my car?

      Please check the product title, fitment notes and vehicle details before ordering. Some models have different bush sizes depending on year, chassis, suspension type or factory options.

      If you’re not 100% sure, send us your vehicle details or registration before ordering and we’ll help confirm the correct Powerflex part for your car.