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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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Meyle Heavy Duty Rear Differential Mount - E46, E83 X3, E85 Z4
Meyle Heavy Duty Rear Differential Mount - E46, E83 X3, E85 Z4 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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Meyle HD - Corporate Logo
T#:186967
Part#: 33176751808MY
In Stock
$ 53.99

This product was last offered at the strikethrough price on
05-07-2026

$ 30.99 USD
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$ 30.99 USD
Free Shipping on orders $49 and up
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This is the rear rubber-isolated differential mount. The diff mounts take the bulk of the twisting and binding as power is transmitted through the differential. We use a Meyle HD rubber bushing for the rear mount as it's stronger than the factory part. (33176751808). We also recommend replacing the front differential mount 33171093175MY at the same time.

Meyle is a German brand in business since 1958 and all of their products are TUV approved and meet or exceed ISO standards. Heavy Duty components are designed to provide significantly long lifespans than other aftermarket and stock OE components. Each part includes a 4 year warranty.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2004-2005 E83 BMW X3 2.5i X3 3.0i
2003-2006 E85 BMW Z4 2.5i Z4 3.0i

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Genuine BMW M Performance Limited Slip 2.81 Differential - F22/23 F3X
Genuine BMW M Performance Limited Slip 2.81 Differential - F22/23 F3X...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW M Performance - Corporate Logo
T#:402424
Part#: 33108659989
In Stock
Sale - Save 8% $ 3,310.99

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

$ 3,062.09 USD
Free Shipping
Add to Wish List
Sale - Save 8%
$ 3,310.99

This product was last offered at the strikethrough price on
06-25-2026

$ 3,062.09 USD
Free Shipping
Add to Wish List
Ensure your getting all the power you can to the road with this LSD from BMW Performance
M Performance Limited Slip Differential Kit - 2.81 - F22/23 F3X M240i 340i 440i (w/ Automatic Trans)
M Performance Limited Slip Differential Kit - 2.81 - F22/23 F3X M240i...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW M Performance - Corporate Logo
T#:25805756
Part#: 33108659989KTKT
Ships in 2 Business Days
$ 3,366.99 USD
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$ 3,366.99 USD
Add to Wish List
Looking to upgrade your stock differential to the BMW M Performance differential? This kit includes the M Performance limited slip diff plus all the hardware necessary to install the diff in your BMW! What exactly does an LSD do you ask? Well, without an LSD your car is effectively only 1 wheel drive, in that it can't supply torque to both wheels at the same time and will only supply torque to the wheel with less grip, which is what the shortfall is to an open differential (what most vehicles have). An LSD only lets the wheels spin at different speeds by a limited amount, which is typically a percentage difference, which is when the differential locks and both wheels get power. This is not how locked differentials work such as in off-road trucks which supply equal torque and rotational speed to both rear wheels at the same time, which can cause issues with handling.
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Genuine BMW M Performance BMW M Performance Limited-Slip Differential - F22 228i M235i F23 M235i
Genuine BMW M Performance BMW M Performance Limited-Slip Differential...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW M Performance - Corporate Logo
T#:222981
Part#: 33108659987
Ships in 2 Business Days
8% off MSRP $ 3,370.00

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

$ 3,100.35 USD
Add to Wish List
8% off MSRP
$ 3,370.00

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

$ 3,100.35 USD
Add to Wish List
For the ultimate in track day performance, the M Performance Limited Slip Differential is here! The clutch-type mechanical differential features a 30% lockup on acceleration and 9% lockup on deceleration. The differential works with the existing DSC system to provide excellent traction wet or dry. It uses the stock 3.08 final drive ratio that the stock M235i uses, so fuel economy will not be affected.  This item fits the following BMWs:
2014+  F22 BMW  228i M235i
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