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BMW Drivetrain Parts for BMW Z4 M Roadster S54 (2003-2008)

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Building your perfect BMW is more than just adding horsepower and stiff suspension. Your drivetrain needs attention in order to deliver power effectively. Most BMWs feature comfortable clutch discs, heavy flywheels, long shifter throws, and open differentials. The drivetrain transmits power to the wheels, but can also be a source of power loss when it is designed for comfort rather than performance. Everything on this page will help you improve your power delivery and driving experience by providing custom Limited Slip Differentials, Short Shift Conversions, Performance Clutch Discs, Lightweight Flywheels, and anything else your BMW needs to be the perfect driving experience.

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Flex Disc - Guibo - E36, E46, E34, Z3, Z4 M cars, 1995-2006

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T#:381880

Part#: 26112226527

In Stock

$ 127.99

This product was last offered at the strikethrough price on
04-16-2026

$ 110.99 USD

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$ 110.99 USD

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This Febi replacement flex disc (aka: the guibo) is a vibration dampener mounted on the back of the transmission which connects to the driveshaft. When it has worn, it produces a terrible vibration throughout the car. It's especially noticeable at low speeds and when starting from a standstill. Oil leaking from the back of the transmission will significantly reduce its life. This can also be used as an upgrade on the E30 M3. It has much more rubber in between the bolt holes which makes it last longer. This is 5mm thicker than the stock E30 flex disc so adjustment of the 2-piece driveshaft may be required. The original flex disc bolts can be re-used. Applications: 1995-1999 E36 M3 manual transmission 2001-2006 E46 M3, M3 CSL manual and SMG transmission 1991-1995 E34 M5 3.6 and 3.8 manual transmission 1998-2002 Z3 M Roadster, M Coupe - S52 and S54 engine manual transmission 2006-current E85 Z4 M Roadster, E86 M Coupe manual transmission

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Febi Driveshaft Centering Sleeve

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T#:382476

Part#: 26117526611

Ships on Aug 31, 2026

$ 23.99 USD

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$ 23.99 USD

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Located at the front of the drive shaft

Febi Febi Manual Transmission Fluid (75w-80) - 1 Liter

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T#:1180762

Part#: G052911

Ships in 1 Business Day

$ 29.99

This product was last offered at the strikethrough price on
07-09-2026

$ 22.99 USD

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$ 22.99 USD

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Fully synthetic high performance GL-5 gear oil excellent lubricating properties, high ageing resistance, and high wetting and adhesion properties

Clutch Master Cylinder

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T#:38655177

Part#: 21521163899

Ships in 4 Business Days

$ 100.99

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

$ 97.99 USD

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$ 97.99 USD

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Automatic Transmission Fluid

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T#:16840502

Part#: 81229400272

In Stock at Vendor

$ 24.99

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

$ 23.99 USD

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$ 23.99 USD

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Automatic transmission fluid is specially formulated to lubricate and cool transmission components, and acts as hydraulic fluid to engage pistons, valves, and clutch packs. ATF, as it is commonly called, also contains special additives to inhibit rust formation, prevent foaming, reduce wear and corrosion, improve flow at temperature extremes, and lubricate seals and gaskets. Regular fluid and filter changes remove unwanted contaminants and renew protective additives in the fluid that are depleted over time. A periodic transmission service improves transmission performance and helps prevent costly damage.

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Differential And LSD Tune

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T#:34382136

Part#: BM237HAKT

Ships in 2 Business Days

$ 2,100.00 USD

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$ 2,100.00 USD

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Upgrade to a better performing LSD, includes tune.

E46 M3, E9X M3, E34 M5, E39 M5, Z4 M OS Giken Super Lock Limited Slip...

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T#:1387

Part#: BM237-HA

Ships in 2 Business Days

$ 1,950.00 USD

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$ 1,950.00 USD

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The M Dynamic limited slip unit on the M3 is designed to be a pure street car differential. It's simply not up to the rigors of professional or amateur racing. The OS Giken Super Lock LSD is giant step up in from a stock M3 lsd unit. It's ready for the extreme conditions of racing, offers 100% progressive locking capability, and is able to do this while operating smoothly and quietly. It's use of advanced technologies that make it perfect for both street cars AND pro race cars... and everything in between. We're excited to be carrying the OS Giken LSD unit in our performance catalog, as we've been using them in our own Championship winning M3 race cars.

OS Giken incorporated revolutionary new ideas when developing the their own limited slip diff, utilizing their accumulated racing knowledge and experience and over 4 years of development. Their design uses an unprecedented number of friction plates (up to 28 total!) for better locking force, better engagement/disengagement, and less generated heat. The end result of their efforts is the OS Giken's OS Super Lock LSD which offers incredible durability and reliability on street and track driven BMWs. The use of highest quality materials, precise machining, forged gears and sound engineering makes this LSD durable and reliable enough for road racing performance (which we can personally vouch for!). This is such a great design, in that it can be used in any situation -- whether it's for a street car, or a 100% Professional race car. Zero break-in required. Super smooth and quiet engagement, and 100% progressive locking capability. Professional installation is recommended.

This Limited Slip Differential Unit fits the following BMWs:
2001-2006 E46 M3 coupe & convertible
2008-2013 E9X M3 coupe & convertible
1991-1995 E34 M5 sedan
1999-2003 E39 M5 sedan
2006-2008 E85 Z4M Z4 M Coupe, Z4 M Roadster

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Febi Pilot Bearing

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T#:340706

Part#: 11211720310

In Stock

Sale - Save 54% $ 13.99

This product was last offered at the strikethrough price on
05-14-2026

$ 6.45 USD

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Sale - Save 54%

$ 13.99

This product was last offered at the strikethrough price on
05-14-2026

$ 6.45 USD

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Replace with every clutch service

Front Axle COLLAR NUT 31211128336

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T#:12519

Part#: 31211128336

In Stock

$ 15.99 USD

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$ 15.99 USD

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COLLAR NUT:319500

Wheel Bearing Circlip - Rear

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T#:594097

Part#: 07119934755

In Stock

$ 4.99 USD

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$ 4.99 USD

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OEM Febi Locking Axle Nut - Most BMWs

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T#:12580

Part#: 33411133785

In Stock

$ 18.72

This product was last offered at the strikethrough price on
04-20-2026

$ 10.99 USD

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$ 10.99 USD

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This is the axle nut that is used on some cars as the rear axle nut or rear output shaft nut. On all-wheel-drive models, it may also be used as the front axle shaft nut.

High Temperature CV Joint Grease - 120g Tube

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T#:26438189

Part#: G000633

In Stock

$ 11.99

This product was last offered at the strikethrough price on
04-15-2026

$ 8.15 USD

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$ 8.15 USD

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Febi Transmission Mount

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T#:363812

Part#: 22316799331

In Stock

$ 12.99 USD

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$ 12.99 USD

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Mounted at the rear of transmission on crossmember

LSD Tune For OS Giken Differential

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T#:34382134

Part#: LSD-TUNE

Ships in 2 Business Days

$ 150.00 USD

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$ 150.00 USD

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Clutch Master Cylinder

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T#:382443

Part#: 21526773670

Special Order: No Guaranteed ETA

$ 81.99 USD

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$ 81.99 USD

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