BMW Differential and Gearing Upgrades for BMW F82 M4 S55 3.0L

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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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Genuine BMW, Hybrid Rear Diff bushing - M2, M3, M4 F8x
Genuine BMW, Hybrid Rear Diff bushing - M2, M3, M4 F8x
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Genuine BMW - Corporate Logo
T#:5457360
Part#: 33179503009
In Stock
13% off MSRP $ 178.99

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$ 154.99 USD
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13% off MSRP
$ 178.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 154.99 USD
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This Updated Genuine BMW hybrid diff bushing helps fix differential clunking noises. 33179503009 replaces weak rubber for better traction and less wheel hop. The ultimate OEM+ drivetrain upgrade for your M-car.
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F8X M2/M3/M4 Rear Subframe Bolt Kit
F8X M2/M3/M4 Rear Subframe Bolt Kit
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:389827
Part#: F8XMRSUBBOLTS
Ships in 2 Business Days
$ 201.99

This product was last offered at the strikethrough price on
07-08-2026

$ 199.99 USD
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$ 199.99 USD
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The rear subframe bolts on the M2/M3/M4 are one-time use only and need to be replaced any time they are removed, such as during a diff install, sway bar install, bushing replacement, or any time the subframe is removed. Re-using the original bolts may damage the threads inside the body so make sure you have new M2/M3/M4 subframe hardware on hand for any work.
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Genuine BMW Differential Oil Pan - F80 M3,F82 M4,F83
Genuine BMW Differential Oil Pan - F80 M3,F82 M4,F83
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:205324
Part#: 33132284835
In Stock
5% off MSRP $ 147.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 140.99 USD
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5% off MSRP
$ 147.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 140.99 USD
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Genuine BMW replacement rear differential oil pan. If you have bottomed the rear end of the car out, chances are the pan could have been damaged of the cooling fins become bent.
Genuine BMW Adapter, Front - 33172284774 - F80 M3,F82 M4,F83
Genuine BMW Adapter, Front - 33172284774 - F80 M3,F82 M4,F83 ...
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Genuine BMW - Corporate Logo
T#:198743
Part#: 33172284774
Ships in 2 Business Days
3% off MSRP $ 239.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 233.99 USD
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3% off MSRP
$ 239.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 233.99 USD
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Genuine BMW Adapter, Front -
This item fits the following BMW Chassis:
F80 M3,F82 M4,F83

Genuine BMW Servo Motor, Differential, R - 33142284191
Genuine BMW Servo Motor, Differential, R - 33142284191
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Genuine BMW - Corporate Logo
T#:174742
Part#: 33142284191
Ships in 2 Business Days
4% off MSRP $ 691.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 660.99 USD
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4% off MSRP
$ 691.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 660.99 USD
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Genuine BMW Servo Motor, Differential, Right -
This item fits the following BMW Chassis:
F06,F10,F12,F13,F80 M3,F82 M4,F83

Genuine BMW Differential - F8x
Genuine BMW Differential - F8x
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:534336
Part#: 33108090473
Ships in 5 Business Days
4% off MSRP $ 4,834.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 4,617.99 USD
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4% off MSRP
$ 4,834.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 4,617.99 USD
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The BMW part number **33108090473** is a **differential assembly** designed for select **BMW M models**, playing a crucial role in the drivetrain by distributing engine power to the wheels. It enables smooth cornering and enhances traction by allowing the wheels to rotate at different speeds. ### **Key Features:** - **Gear Ratio:** 3.46:1, providing a balance between acceleration and top-end performance. - **Vehicle Compatibility:** Designed for **BMW M2, M3, and M4 models** (2015–2021). - **OEM Quality:** Genuine BMW part, ensuring durability, reliability, and precise fitment.
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