Powerflex Rear Differential Front Mounting Bush BMW F8X M2, M3, M4 Competition - Clubsport Garage
Powerflex Rear Differential Front Mounting Bush BMW F8X M2, M3, M4 Competition - Clubsport Garage
Powerflex Rear Differential Front Mounting Bush BMW F8X M2, M3, M4 Competition - Clubsport Garage
Powerflex Rear Differential Front Mounting Bush BMW F8X M2, M3, M4 Competition - Clubsport Garage
Powerflex Rear Differential Front Mounting Bush BMW F8X M2, M3, M4 Competition - Clubsport Garage

Powerflex Rear Differential Front Mounting Bush BMW F8X M2, M3, M4 Competition

By Powerflex
From £305.00
Worldwide Shipping
Official Dealer
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Product Description

The Powerflex Rear Differential Front Mounting Bush is a replacement differential bush upgrade for compatible BMW F8X M models, including the BMW F87 M2 Competition, BMW F80 M3 and BMW F82 M4. Designed to provide additional support at the front differential mounting point, it helps improve drivetrain stability under acceleration and hard driving.

This bush features a built-in support washer, giving the differential extra stability and helping reduce unwanted movement under load. By better controlling differential movement, it can support a more settled rear-end feel and improved drivetrain response during fast road, track day and performance use.

The bush is available in Powerflex Purple or Powerflex Black Series. The Purple option is suited to performance road and fast road use, while the Black Series option is stiffer and more focused towards track or motorsport applications.

This front differential mounting bush complements the Powerflex Dual Mount Rear Differential Bracket, with rear differential mounting bushes also available separately for customers looking to further improve differential support and rear-end control.

Powerflex part numbers are PFR5-4025 and PFR5-4025BLK, with diagram number 21. Please confirm vehicle model, year, differential setup and bush location before ordering.

Further information below.

Key Features
  • Powerflex Rear Differential Front Mounting Bush for BMW F8X M2, M3 and M4 Competition
  • Replacement front differential mounting bush for improved drivetrain stability
  • Designed to help control differential movement under acceleration
  • Built-in support washer provides additional stability and support
  • Helps improve differential location during hard driving
  • Suitable upgrade for fast road, track day and performance applications
  • Available in Powerflex Purple or Powerflex Black Series
  • Black Series option offers a stiffer bush for more focused performance use
  • Complements the Powerflex Dual Mount Rear Differential Bracket
  • Rear differential mounting bushes also available separately
  • Powerflex part numbers: PFR5-4025 and PFR5-4025BLK
  • Diagram number: 21

Vehicle Compatibility
  • Suitable for compatible BMW F8X M models using the front differential mounting bush shown as diagram number 21.
  • Available in Powerflex Purple or Powerflex Black Series depending on required stiffness.
  • Powerflex part numbers: PFR5-4025 and PFR5-4025BLK.
  • Complements the Powerflex Dual Mount Rear Differential Bracket.

What's Included
  • Powerflex rear differential front mounting bush
  • Built-in support washer
  • Selected Powerflex Purple or Powerflex Black Series option
  • Powerflex part number: PFR5-4025 or PFR5-4025BLK
  • Diagram number: 21

FAQs

What does the Powerflex Rear Differential Front Mounting Bush do?

It helps control differential movement under acceleration, improving drivetrain stability and rear-end control.

Which vehicles is this bush suitable for?

It is suitable for BMW F87 M2 Competition, BMW F80 M3 and BMW F82 M4 applications, depending on differential setup and bush location.

What is the built-in support washer for?

The built-in support washer provides additional stability and support to help keep the differential more securely located under load.

What options are available?

The bush is available in Powerflex Purple or Powerflex Black Series. The Black Series option is stiffer and more focused towards performance use.

What are the Powerflex part numbers?

The part numbers are PFR5-4025 and PFR5-4025BLK.

What diagram number is this bush?

This bush is shown as diagram number 21.

Does this work with the Powerflex Dual Mount Rear Differential Bracket?

Yes. This bush complements the Powerflex Dual Mount Rear Differential Bracket.

Are rear differential bushes available separately?

Yes. Differential rear mounting bushes are also available separately.

Is this suitable for track use?

Yes. This bush is suitable for fast road, track day and performance applications where improved differential stability is beneficial.

Should fitment be checked before ordering?

Yes. Please confirm vehicle model, year, differential setup and bush location before ordering.

Shipping & Delivery

Dispatch Times

Most stocked items dispatch within 1–2 business days. Some products may have longer lead times due to special ordering, availability, or build times. If your order contains multiple items, they may be shipped together once all items are ready unless otherwise agreed.

UK & International Shipping

We ship worldwide. Transit times vary depending on destination and courier. Tracking details are provided once your order is dispatched.

Import Duties & International Orders

International customers are responsible for all import duties, taxes, and clearance fees. These are not included in our prices and are outside of our control. Refusal or non-payment of import charges may result in return shipping, handling fees, and customs charges being deducted from any refund.

Damaged Shipments

If your parcel arrives visibly damaged, please refuse delivery or note the damage with the courier. If damage is discovered after opening, contact us immediately with photos. Do not install damaged items, as installation voids courier claims and return eligibility.

Returns

Returns must be authorised before sending anything back. Returns must be requested within 14 days of delivery and returned within 14 days of approval, in unused/uninstalled condition and in original packaging. Some items, including special-order, built-to-order, used, installed, or modified parts, are non-returnable.

Full details are available in our Shipping Policy and Returns & Refund Policy.

Warranty & Disclaimer

Warranty

Most products include a manufacturer’s warranty covering manufacturing defects only. Warranties do not cover wear and tear, improper installation, misuse or neglect, track use, competition or racing environments, labour costs, vehicle damage, downtime, or consequential loss. Warranty outcomes are determined by the manufacturer, not Clubsport Garage. Items must be returned for inspection at the customer’s cost unless agreed otherwise.

Fitment & Installation

Many products are aftermarket components and may require professional installation or minor adjustment. Perfect OEM-level fitment cannot be guaranteed. Professional installation by an experienced workshop is strongly recommended. Installed or used items cannot be returned.

Motorsport Use Disclaimer

Some products are intended for off-road, track, or motorsport use only and may not be legal for road use, for example non-TÜV/DOT-approved parts. It is the customer’s responsibility to ensure compliance with local laws, insurance requirements, and vehicle regulations. By purchasing and installing aftermarket parts, you accept all responsibility for ensuring compatibility, legal compliance, proper installation, and any resulting wear, damage, or failure.

Product Images & Descriptions

Product photos are illustrative and may differ slightly from the item supplied. If specific details are important, please contact us before purchasing.

Full details are available in our Terms of Service and related policy pages.