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

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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Bav Auto Universal Flex Disc "Guibo" - E36 E46 E34 Z3 Z4 M Models ...

10X Entries Into Our F80 M3 Sweepstakes

T#:1135777

Part#: 26112226527

In Stock

Sale - Save 10% $ 73.99

This product was last offered at the strikethrough price on
05-03-2026

$ 66.59 USD

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Sale - Save 10%

$ 73.99

This product was last offered at the strikethrough price on
05-03-2026

$ 66.59 USD

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This Bav Auto 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 can produce knocking sounds and 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.

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Z4 M HD Clutch and Flywheel Kit

T#:878

Part#: 520-010S-S873G

Ships in 9 Business Days

$ 1,488.61 USD

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$ 1,488.61 USD

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This lightweight aluminum flywheel w/ Heavy Duty "sprung-hub" clutch package is the best-engineered solution for E46 325 and 330 models with the 6-speed transmission, Z4 2.5/3.0, and Z4 M Roadster and M Coupe. Instead of picking a clutch from another car that may or may not work at all, the engineers at JB Racing have taken all of the guess work out of this upgrade and incorporated a Sachs sport sprung-hub clutch with the correct pressure plate and combined it with their most-popular aluminum lightweight flywheel. The Sachs HD clutch disc has a sprung hub to minimize noise and vibration and organic linings to give the feel and engagement of a stock clutch. Mixing and matching of the incorrect clutch, pressure plate, and flywheel components can lead to inconsistent engagement and feel -- why make your clutch feel worse?

In addition, the Sachs HD pressure plate will clamp with greater force -- allowing approximately 350 ft-lbs of torque, which makes it an obvious upgrade from the stock clutch kit. And with the aluminum flywheel weight savings is substantial over the stock dual-mass flywheel - which allows your motor to spool up faster and transmit more HP to the ground.

Because Sachs is an OE supplier to most German cars, replacement parts are just a phone call away. This kit uses the stock throw-out bearing (included in the price).

Z4 M Sport Clutch and Flywheel Applications:
2006-2008 E85 Z4, E86 Z4 Z4 M Roadster, Z4 M Coupe

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Sachs Performance BMW Z4M Power Clutch Kit

T#:15710797

Part#: 001243.999515G

Ships in 5 Business Days

$ 816.99 USD

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$ 816.99 USD

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Performance Clutch Kit for use with factory flywheel, capable of handling up to 400 ft lbs of torque with OE clutch feel

Bav Auto Automatic Transmission Filter Kit - E39 E46 Z4 (A5S325Z Tran...

10X Entries Into Our F80 M3 Sweepstakes

T#:639803

Part#: 24341423376

In Stock

Sale - Save 20% $ 29.99

This product was last offered at the strikethrough price on
05-03-2026

$ 23.99 USD

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Sale - Save 20%

$ 29.99

This product was last offered at the strikethrough price on
05-03-2026

$ 23.99 USD

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Remember to service your transmission at the recommended intervals to increase your transmission's life span and reliability! From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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

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Bav Auto Universal Flex Disc "Guibo" - E36 E46 E34 Z3 Z4 M Models ...

Z4 M HD Clutch and Flywheel Kit

Sachs Performance BMW Z4M Power Clutch Kit

Bav Auto Automatic Transmission Filter Kit - E39 E46 Z4 (A5S325Z Tran...

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