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Powerflex BMW Differential and Gearing Upgrades

Upgrading various parts of the differential can have tremendous benefits in your car's performance. It's easy to forget that the differential is a source for making your car faster and handle better so it's often overlooked. The engine is not the only place to make the car faster. Our differential options vary from gearing upgrades to limited slip conversions. You can purchase the ring & pinion gear sets on their own (professional installation required) or have us build a diff around your own specifcations. The options are almost endless! Every custom-built diff is fully rebuilt with seals and bearings. We also design and supply bushing options to reduce driveline wind-up, finned differential covers for better cooling, and more!

Ratio Changes - Changing the differential gearing is one of the best and most-effective upgrades you can make on any BMW (old or new). By using a shorter (numerically higher) final drive ratio you are increasing your RPM relative to road speed - this puts you in a more powerful RPM range than before! Since you're in a 'meatier' part of the power band you're now putting down more power/torque to the ground. If you can trade outright top speed for faster acceleration at daily speeds then this is the perfect upgrade for you.

Limited Slip Upgrades - Sadly, many BMWs today are not equipped with a limited slip (posi-traction) differential. BMW has tried to compensate by using traction control that cuts power at the engine or applies the brakes to retard wheel spin (or a combination of both). But nothing beats the function and feel of a a true LSD which may be why BMW continues to use them in M cars. Our LSD upgrades can be done a number of different ways - a factory-type limited slip unit with either 2 or 3 clutch packs, helical type, OS Giken unit, or something truly custom. We can also vary ramp angles and setup to change the limited-slip behavior under acceleration, deceleration, and cornering. Need a custom diff? Call or e-mail to have a quote.
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Powerflex Rear Diff Rear Mounting Bushing - F8X M2,M3,M4
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:554716
Part#: PFR5-4026
In Stock
$ 109.99 USD
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$ 109.99 USD
Free Shipping
Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.
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Powerflex Polyurethane Rear Differential Bushing - E30 E36 318ti Z3 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:376526
Part#: PFR5-300
In Stock
$ 48.99 USD
Free Shipping on orders $49 and up

Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.

By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. 

Engineered to perform, Powerflex performance polyurethane differential bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved acceleration response, more direct shifting feel and overall improved drivetrain composure with Powerflex performance polyurethane bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

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Powerflex Differential Dual-Mount Bushing & Bracket Set - Street Bush...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:37925919
Part#: PFR54030KT
In Stock
$ 876.99 USD
Free Shipping on orders $49 and up
Lock your differential down with this complete kit featuring Powerflex's Dual-Mount bracket and street bushings

Powerflex Polyurethane Rear Differential Rear Position Bushing Set - ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:376418
Part#: PFR5-1226
In Stock
$ 52.99 USD
Free Shipping on orders $49 and up

Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.

By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. 

Powerflex street bushings are ideal for street driven vehicles and those that see occasional autocross or track time. Need bushings for a dedicated track car? Powerflex Black Series bushings are the ultimate in track and race bushings. Featuring 95A durometer polyurethane, Black Series bushings are 25% stiffer than street bushings. Engineered to perform, Powerflex performance polyurethane control arm bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved steering feel, turn in, more responsive handling and overall improved chassis composure with Powerflex performance polyurethane control arm bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

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Powerflex Polyurethane Rear Differential Front Position Bushing - E46...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:362735
Part#: PFR5-4621
In Stock
$ 42.99 USD
Free Shipping on orders $49 and up

Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.

By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. 

Powerflex Black Series bushings are the ultimate in track and race bushings. Featuring 95A durometer polyurethane, Black Series bushings are 25% stiffer than street bushings. Engineered to perform, Powerflex performance polyurethane control arm bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved acceleration response, more direct shifting feel and overall improved drivetrain composure with Powerflex performance polyurethane bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

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Powerflex Performance Polyurethane Rear Differential Bushing Set - Re...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:376493
Part#: PFR5-426
In Stock
$ 54.99 USD
Free Shipping on orders $49 and up

Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.

By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. 

Powerflex street bushings are ideal for street driven vehicles and those that see occasional autocross or track time. Need bushings for a dedicated track car? Powerflex Black Series bushings are the ultimate in track and race bushings. Featuring 95A durometer polyurethane, Black Series bushings are 25% stiffer than street bushings. Engineered to perform, Powerflex performance polyurethane control arm bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved steering feel, turn in, more responsive handling and overall improved chassis composure with Powerflex performance polyurethane control arm bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

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Powerflex Rear Differential Rear Mount Bushing - F07/F10
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:638068
Part#: PFR5-6031
In Stock
$ 69.99 USD
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$ 69.99 USD
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As a direct replacement for the OE rubber bushings, these new bushings reduce movement in the differential preventing the commonly experienced rear-end transmission 'thud' while offering improved performance and durability. Replaces OE Part Number: 33316797238 & 33316792872
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Powerflex Rear Differential Front Mount Bushings - F07/F10
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:638069
Part#: PFR5-6032
In Stock
$ 110.99 USD
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$ 110.99 USD
Free Shipping
As a direct replacement for the OE rubber bushings, these new bushings reduce movement in the differential preventing the commonly experienced rear-end transmission 'thud' while offering improved performance and durability. Replaces OE Part Number: 33316792873
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Powerflex BMW E46 - Z4 Rear Diff Front Mount
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:33913480
Part#: PFR5-4621H
In Stock
$ 42.99 USD
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The Powerflex Rear Diff Front Mount Bushing for the BMW E46 3 Series and Z4 is a premium upgrade designed to enhance the stability and performance of the drivetrain. Here’s an alternative description:

  • High-Performance Polyurethane: Powerflex bushings are made from advanced polyurethane, which is significantly more durable than standard rubber. This material resists wear, deformation, and the effects of heat, oil, and contaminants, making it a long-lasting solution for high-performance applications.

  • Purpose: The rear differential front mount is subjected to high levels of stress during acceleration and cornering. Over time, the stock rubber bushing can degrade, causing excessive movement in the differential. The Powerflex bushing eliminates this movement, allowing for improved drivetrain control and reducing unwanted flex.

  • Key Features:

    • Enhanced Rigidity: By replacing the softer OEM rubber with Powerflex’s stiffer polyurethane, this bushing minimizes differential movement under load, resulting in improved throttle response and sharper handling.
    • Improved Longevity: Unlike the factory rubber mounts, which can crack and wear out over time, the polyurethane construction ensures long-lasting performance and reliability.
    • Performance-Oriented Design: Powerflex’s bushing is engineered to handle the increased demands of spirited driving and track use, offering better control without sacrificing comfort.
  • Benefits:

    1. Improved Power Transfer: Reducing differential movement helps direct more power to the wheels, improving acceleration and delivering a more connected driving feel.
    2. Better Handling and Stability: With less flex in the differential, the car becomes more stable, particularly during cornering and high-speed driving, enhancing overall handling precision.
    3. Durable and Maintenance-Free: Polyurethane bushings are resistant to common automotive chemicals, heat, and road debris, providing a set-and-forget solution that lasts longer than rubber components.
  • Fitment: This bushing is designed as a direct replacement for the front mount of the rear differential in BMW E46 3 Series and Z4 models. It installs easily, without requiring modifications, and offers an immediate improvement in drivetrain response.

In summary, the Powerflex Rear Diff Front Mount Bushing is an essential upgrade for BMW E46 and Z4 drivers who want to improve drivetrain rigidity, reduce flex, and enhance overall performance. This bushing provides a durable, long-lasting solution that’s perfect for both street and track use, delivering better power transfer and handling.

4o


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BMW G8X Rear Diff Front Mounting Bushing (Street)
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:16907150
Part#: PFR5-4024
In Stock
$ 391.99 USD
Free Shipping on orders $49 and up

BMW G8X Rear Diff Front Mounting Bushing (Street) is a high-performance upgrade designed to enhance the stability and control of the BMW G8X's rear differential. This bushing features a robust construction combining CNC-machined aluminum and high-quality polyurethane to provide superior drivetrain support and minimize deflection.

  • Improved Drivetrain Stability: Reduces drivetrain deflection for better handling and control.
  • Enhanced Launch Performance: Minimizes wheel-hop during aggressive starts and hard launches.
  • Durable Construction: Made from black anodized 2011-T6 aluminum and high-strength polyurethane.
  • Choice of Hardness: Available in signature purple 80A durometer or black 95A durometer polyurethane to suit different driving needs.
  • Direct Replacement: Designed as a full bushing replacement for easy installation and improved performance.
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Powerflex Performance Polyurethane Differential Bushings - E36 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:378991
Part#: PFR5-325
Ships in 1 Business Day
$ 44.99 USD
Free Shipping on orders $49 and up

Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.

By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. 

Engineered to perform, Powerflex performance polyurethane differential bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved acceleration response, more direct shifting feel and overall improved drivetrain composure with Powerflex performance polyurethane bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

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Powerflex Rear Differential Mount Inserts - Front Position - F22 F30 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:640909
Part#: PFR5-1927
In Stock
$ 68.99 USD
Free Shipping
$ 68.99 USD
Free Shipping
Fits into the voids of OE bushings: 33316792513 Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged. By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. Powerflex Black Series bushings are the ultimate in track and race bushings. Featuring 95A durometer polyurethane, Black Series bushings are 25% stiffer than street bushings. Engineered to perform, Powerflex performance polyurethane control arm bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved acceleration response, more direct shifting feel and overall improved drivetrain composure with Powerflex performance polyurethane bushings. Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers.
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Powerflex Performance Polyurethane Differential Bushings - E46, E83, ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:378993
Part#: PFR5-4625X2
In Stock
$ 94.99 USD
Free Shipping
$ 94.99 USD
Free Shipping

Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.

By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. 

Powerflex street bushings are ideal for street driven vehicles and those that see occasional autocross or track time. Need bushings for a dedicated track car? Powerflex Black Series bushings are the ultimate in track and race bushings. Featuring 95A durometer polyurethane, Black Series bushings are 25% stiffer than street bushings. Engineered to perform, Powerflex performance polyurethane control arm bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved steering feel, turn in, more responsive handling and overall improved chassis composure with Powerflex performance polyurethane control arm bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

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Powerflex BMW E46 M3 Rear Diff Rear Mount
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:34080712
Part#: PFR5-4620H
In Stock
$ 147.99 USD
Free Shipping on orders $49 and up

The Powerflex Heritage Rear Differential Mount for the BMW E46 M3, available through outlets like Turner Motorsport, is an ideal upgrade for enthusiasts seeking to enhance the performance and durability of their car's rear differential while preserving its classic appearance. The Heritage Series is tailored for those who prefer a more subtle aesthetic than the brightly colored bushings typical of Powerflex's standard line.

Key features:

  • Heritage Polyurethane Composition: The bushings are made from high-performance polyurethane, providing superior resistance to wear, cracking, and degradation compared to the original rubber mounts. This helps improve handling without compromising ride comfort.
  • Classic Appearance: Unlike the regular Powerflex bushings, which come in bright colors (yellow or purple), the Heritage Series bushings are finished in a muted dark green/black, allowing them to blend seamlessly into the undercarriage of the vehicle, ideal for those who prefer a more OEM look.
  • Enhanced Handling and Stability: The rear diff mount works to reduce the unwanted movement of the differential, which translates to improved traction, better throttle response, and more consistent handling in high-load scenarios like hard cornering or acceleration. This significantly reduces wheel hop and enhances rear-end stability.
  • Direct Fitment: These mounts are designed to be a direct replacement for the factory bushings, requiring no additional modifications. This makes them an excellent choice for both DIY and professional installs.
  • Perfect for Street and Track Use: Combining durability and flexibility, this mount is suitable for E46 M3s that see a mix of daily driving and occasional track use, offering the best of both worlds by improving responsiveness while maintaining comfort.

Turner Motorsport often emphasizes the balance of performance and OEM-like comfort with these mounts, making them an excellent choice for those wanting to upgrade their rear differential mounting without detracting from the car's original feel.

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Powerflex Performance Polyurethane Differential Bushings - E36 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:378980
Part#: PFR5-326X2
Ships in 1 Business Day
$ 139.99 USD
Free Shipping
$ 139.99 USD
Free Shipping

Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.

By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. 

Engineered to perform, Powerflex performance polyurethane differential bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved acceleration response, more direct shifting feel and overall improved drivetrain composure with Powerflex performance polyurethane bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

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PowerFlex Heritage Rear Differential Bushing - Front Position - E34/E...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:38229087
Part#: PFR5-631H
In Stock
$ 55.99 USD
Free Shipping on orders $49 and up
This Rear Diff Front Mount Bushing is perfect for BMW E34 and E32 owners looking to improve their vehicle’s rear suspension dynamics and drivetrain stability. It’s an ideal choice for enthusiasts who want better control and responsiveness without sacrificing too much ride comfort, offering a long-lasting, low-maintenance upgrade for daily driving or performance use.
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Rear Diff Front Mounting Bushing (Race)
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:16907151
Part#: PFR5-4024B
Ships in 1 Business Day
$ 391.99 USD
Free Shipping on orders $49 and up
Powerflex BMW Z3 - E30 3 Series - 318Ti Rear Diff Bushing
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:33946923
Part#: PFR5-300H
Ships in 1 Business Day
$ 48.99 USD
Free Shipping on orders $49 and up

The Powerflex Rear Diff Bushing for BMW Z3, E30 3 Series, and 318Ti is a high-performance replacement for the factory rubber bushings in the rear differential. This upgrade is ideal for improving handling, power delivery, and drivetrain stability, especially on aging vehicles where the original bushings may have deteriorated.

Key Features:

  1. Polyurethane Construction: Unlike the OEM rubber bushings, Powerflex bushings are made from durable polyurethane, which resists wear from exposure to heat, oil, and road debris. This increases the longevity of the bushing and ensures consistent performance over time.

  2. Handling Improvements: The stiffer polyurethane material significantly reduces the flex and movement of the differential during acceleration, braking, and cornering. This helps improve the overall stability and precision of the vehicle’s rear-end, enhancing cornering performance and delivering better power transfer to the wheels.

  3. Versions for Different Needs:

    • Road Series: Designed for daily driving, these bushings offer an excellent balance of performance and comfort, maintaining near-factory levels of ride quality while improving rear differential control.
    • Black Series: These bushings are made from a much stiffer polyurethane (95A durometer) and are designed for motorsport or track applications. They provide maximum control and minimal flex, at the expense of an increase in NVH (noise, vibration, and harshness).
  4. Direct Fitment: These bushings are designed as direct replacements for the stock bushings, making installation relatively straightforward. This is especially useful for older models like the E30 and Z3, where original bushings may have degraded or cracked, causing clunking noises and excessive differential movement.

  5. Performance Gains: With reduced differential movement, drivers can expect sharper throttle response, improved traction under load, and better cornering dynamics, making it a perfect upgrade for those who want to refresh and enhance the performance of their BMW's rear suspension.

Application:

  • BMW Z3
  • BMW E30 3 Series
  • BMW E36 318Ti (Compact)

This Powerflex rear diff bushing upgrade is ideal for anyone looking to improve the handling characteristics of their BMW while adding durability and reliability to the drivetrain setup.

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Powerflex Black Series Rear Diff Front Bushings - BMW E60/E61 E63/64 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:34549569
Part#: PFR5-725BLK
Ships in 1 Business Day
$ 96.99 USD
Free Shipping on orders $49 and up

The Powerflex Rear Differential Front Bushings for the BMW E60 5-Series and E63 6-Series are specifically engineered to optimize the performance of the rear differential assembly. By replacing the factory rubber bushings with robust polyurethane, these bushings provide numerous benefits that enhance vehicle handling and stability.

Key Benefits:

  1. Enhanced Power Delivery: The firmer polyurethane material reduces flex and movement in the differential mount, ensuring better alignment and stability. This improvement leads to more effective power transfer from the engine to the wheels, resulting in enhanced acceleration and performance.

  2. Increased Longevity: Powerflex bushings are designed to withstand harsh driving conditions, resisting wear from heat, oil, and road debris. Unlike conventional rubber bushings, which can deteriorate over time, these polyurethane bushings maintain their performance over a longer period.

  3. Improved Handling Dynamics: By minimizing unwanted movement in the rear differential, these bushings enhance the vehicle’s handling characteristics. Drivers will experience reduced body roll and increased traction, allowing for a more controlled and confident driving experience, especially in high-performance situations.

  4. Superior Road Feel: The stiffer construction of these bushings enhances feedback to the driver, improving steering response and overall road feel. This connection allows for a more engaging driving experience, as drivers can better sense the vehicle’s dynamics.

  5. Simple Installation: These bushings are specifically designed to fit the E60 and E63 models directly into the existing differential mounts. The installation process is straightforward, requiring no modifications, which makes it an accessible upgrade for DIY enthusiasts.

This upgrade is perfect for BMW E60 5-Series and E63 6-Series owners seeking to enhance their vehicle’s rear differential performance and overall handling capabilities. The Powerflex Rear Differential Front Bushings offer a reliable solution for improving the effectiveness of the rear suspension system, making them suitable for everyday driving as well as spirited performance applications.

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Powerflex BMW E39 5 Series Rear Diff Rear Mount Bushings
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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T#:34549562
Part#: PFR5-526H
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$ 93.99 USD
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The Powerflex Rear Differential Rear Mount Bushings for the BMW E39 5 Series are designed to provide a significant upgrade to the vehicle's rear differential system by replacing the stock rubber bushings with high-performance polyurethane. This enhancement leads to improved handling, stability, and durability.

Key Benefits:

  1. Enhanced Differential Control: The stiffer polyurethane material reduces unwanted movement and flex in the differential mount, ensuring better alignment and stability under load. This translates to improved power delivery and handling during cornering and acceleration.

  2. Increased Longevity: These bushings are crafted to resist wear and degradation from oil, heat, and road debris, offering superior durability compared to traditional rubber bushings. This longevity ensures that the performance benefits are maintained over time.

  3. Improved Driver Feedback: By minimizing movement in the rear differential, these bushings enhance the connection between the vehicle and the driver. This results in better feedback and control, allowing for a more engaging driving experience.

  4. Direct Fit for Easy Installation: Designed specifically for the E39 5 Series, these bushings fit directly into the existing differential mounts, facilitating a hassle-free installation process without the need for modifications.

This upgrade is perfect for BMW E39 5 Series enthusiasts who want to improve their vehicle's handling and performance, making it suitable for both daily driving and spirited performance applications. The Powerflex Rear Differential Rear Mount Bushings provide a reliable solution to enhance the overall effectiveness of the rear suspension system.

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Powerflex Rear Diff Front Mount Bushing - Street - E34 5 Series / E32...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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T#:13793032
Part#: PFR5-631
Ships in 1 Business Day
$ 55.99 USD
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Differentials serve the key purpose of transmitting power from the driveshaft to the axles. Factory rubber bushings absorb some of this power to allow for cushy, comfortable acceleration, at the expense of performance. Many OEM differential bushings are fast-wearing and failure prone, resulting in driveline slop and thunks when shifting or going over bumps. Powerflex polyurethane differential bushings are firmer than OEM rubber bushings, eliminating associated driveline slop and allowing for the crisp application of power to the ground, resulting in better throttle response and control. Powerflex is the number one selling suspension bushing manufacturer in Europe. Their experience with polyurethane bushing material and state-of-the art manufacturing techniques allows them to produce premium performance bushings, made to exact-fit standards. Powerflex performance polyurethane bushings are built to last longer than OEM rubber bushings, while improving performance and allowing for a more engaging driving experience. Use of Powerflex Copper Grease PCG1 is recommended for ease of installation. Periodic reapplication is recommended to extend squeak-free service life of bushings. Powerflex Black Series bushings are the ultimate in track and race bushings. Need bushings for a car that's street-driven? Powerflex street bushings are an ideal alternative for street driven vehicles and those that see occasional autocross or track time. Powerflex is proud to offer a lifetime warranty to the original purchaser on all products.
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Powerflex Differential Dual-Mount Bushing & Bracket Set - Track Bushi...
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T#:44835449
Part#: PFR54030BKT
In Stock
$ 935.99 USD
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Lock your differential down with this complete kit featuring Powerflex's Dual-Mount bracket and race/track bushings
PowerFlex Rear Diff Front Mount Bushing - E36 - M4, M44, M50, M52, S5...
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T#:54281644
Part#: PFR5-325H
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$ 44.99 USD
$ 44.99 USD
The Powerflex Heritage Series is a premium motorsport upgrade engineered to eliminate critical differential deflection. Molded from an advanced, proprietary polyurethane formula, this bushing stabilizes the differential nose under high-torque loading.
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PowerFlex Rear Diff Front Mount Bushing - E36 M3 Evo - S50B32 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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T#:54317182
Part#: PFR5-324H
Ships in 1 Business Day
New Item
$ 51.99 USD
$ 51.99 USD
Ensure your build operates at peak mechanical efficiency. Eliminate driveline slop and secure your differential assembly with track-proven engineering.


PowerFlex Rear Diff Rear Mount Bushing - E36 - M42, M44, M50, M52, S5...
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Powerflex - Corporate Logo
T#:54281641
Part#: PFR5-326H
Ships in 1 Business Day
New Item
$ 139.99 USD
$ 139.99 USD
The Powerflex Heritage Collection replaces the soft factory unit with an engineered, high-performance polyurethane compound. It is designed to constrain differential rotation and stabilize the driveline without changing the classic aesthetic of the vehicle undercarriage.
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BMW E21 Rear Diff Mounting Bushing
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T#:54352781
Part#: PFR5-1625H
Ships in 1 Business Day
New Item
$ 89.99 USD
$ 89.99 USD
Performance Polyurethane Rear Differential Bushings
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:54317180
Part#: PFR5-324
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$ 51.99 USD
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Powerflex Performance Polyurethane Differential Bushing - E21 320i ...
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T#:554702
Part#: PFR5-1625X2
Ships in 1 Business Day
$ 89.99 USD
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$ 89.99 USD
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Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.

By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. 

Powerflex Black Series bushings are the ultimate in track and race bushings. Featuring 95A durometer polyurethane, Black Series bushings are 25% stiffer than street bushings. Engineered to perform, Powerflex performance polyurethane control arm bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved acceleration response, more direct shifting feel and overall improved drivetrain composure with Powerflex performance polyurethane bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

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Powerflex Rear Diff Rear Mounting Bushing - 2002
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Powerflex - Corporate Logo
T#:15710802
Part#: PFR5-2025X2
Ships in 1 Business Day
$ 89.99 USD
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Poly bushings give a provide a more connected feel between you and your vehicle via a higher durometer than stock rubber bushings. Sometimes, this can be at the expense of NVH (noise, vibration, and harshness), but if you are driving your car on the track or just commuting in a spirited manner, poly may be a good option for you!
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BMW 1502-2002 (1962 - 1977) Rear Diff Rear Mounting Bushing
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Powerflex - Corporate Logo
T#:54352762
Part#: PFR5-2025H
Ships in 1 Business Day
New Item
$ 89.99 USD
$ 89.99 USD
By stabilizing the differential's position relative to the subframe, the rear diff bushing helps maintain static axle angles under extreme loads, reducing wear on peripheral drivetrain components and providing a highly predictable, repeatable platform for track setups.
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Powerflex BMW E60 - E61 5 Series Rear Diff Bushing
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T#:33880014
Part#: PFR5726
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$ 62.99 USD
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The Powerflex Rear Diff Rear Bushings for the BMW E60 5-Series and E63 6-Series are performance-oriented components designed to upgrade the rear differential mount system. Here’s a detailed description of their features and benefits: Durable Polyurethane Construction: These bushings are crafted from high-quality polyurethane, which is known for its resilience and ability to withstand harsh conditions. Unlike factory rubber bushings that can degrade over time, Powerflex bushings maintain their integrity and performance even under extreme driving conditions. Enhanced Differential Control: The stiffer nature of the polyurethane material reduces unwanted movement of the rear differential during acceleration and cornering. This results in improved control and stability, allowing for better power delivery and overall performance. Improved Handling Dynamics: By minimizing differential movement, the Powerflex bushings help maintain the proper alignment of the rear suspension. This leads to enhanced handling characteristics, providing a more connected and responsive driving experience, especially in spirited or performance driving scenarios. Minimized Wear and Tear: The durable construction of these bushings reduces the likelihood of premature wear, extending the lifespan of the differential and surrounding components. This makes them a smart investment for both daily drivers and performance enthusiasts. Reduced NVH Levels: While offering performance enhancements, Powerflex has designed these bushings to keep noise, vibration, and harshness (NVH) increases to a minimum. This balance allows for a comfortable driving experience without sacrificing the benefits of improved handling. Easy Installation: Specifically designed for the BMW E60 and E63 models, these bushings offer a direct replacement for the factory components. This ensures a hassle-free installation process, making them accessible to both DIY enthusiasts and professional mechanics. Ideal for Performance Upgrades: Whether you're modifying your vehicle for track use or simply looking to enhance everyday performance, these bushings provide a significant upgrade over the stock components, making them a popular choice among BMW enthusiasts.
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PowerFlex Rear Diff Rear Mounting Bushing - E10
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T#:54352763
Part#: PFR5-2025BLK
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$ 102.99 USD
$ 102.99 USD
The Powerflex Black Series is engineered for maximum performance and minimum deflection