PMC Motorsport Stage 2 – clutch kit BMW M50 M52 M54 S50 S52 S54 – 6-speed manual BMW M57N2 ZF GS6-53DZ HGU HGK 325d 330d – 215 mm / 8.46" Twin disc – Sachs XTend 3000 950 709 – max. 700 Nm / 516 lb⋅ft

Complete Stage 2 clutch kit enabling the connection (swap / conversion) of BMW M50, M52, M54, S50, S52, and S54 inline 6-cylinder engines with the ZF GS6-53DZ HGU / HGK 6-speed manual gearbox used in BMW M57N2 diesel models (E90 / E91 / E92 / E93 325d and 330d), as well as xDrive GS6X53DZ HGW / HGL versions. The engine remains in the standard, factory mounting position. The kit includes an aluminum gearbox adapter plate, a custom PMC Motorsport flywheel designed for a 215 mm twin-disc clutch, the Sachs XTend 3000 950 709 twin-disc clutch from the BMW E9x M3 V8 – self-adjusting pressure plate (SAC), two clutch discs, and a release bearing – as well as a clutch fork. The maximum torque capacity of the kit is 700 Nm (516 lb⋅ft). An ideal solution for high-power turbo projects – for daily driving, drifting, and motorsport.

Do you want to replace the 5-speed ZF-5 / Getrag gearbox in your BMW powered by an M50 / M52 / M54 / S50 / S52 / S54 engine with a heavy-duty 6-speed GS6-53DZ gearbox and a robust twin-disc clutch? Our kit is a reliable solution. Gain a durable 6-speed BMW manual transmission and easy access to replacement parts.

Aluminum gearbox adapter plate designed to simplify gearbox installation as much as possible, eliminating radical measures such as cutting off the entire bellhousing – only the starter motor pocket needs to be prepared. Custom flywheels dedicated to PMC Motorsport adapters are made of aluminum with a replaceable friction surface, checked and balanced prior to shipping. Flywheel designed for the Sachs XTend 3000 950 709 (3000.950.709-S) twin-disc clutch with a diameter of 215 mm (8.46") from the BMW E9x M3 V8. Two friction discs transmit significantly more torque than a single-disc clutch of the same diameter while maintaining pedal comfort thanks to the self-adjusting pressure plate. Adapter thickness: 15 mm (0.59").

PMC Motorsport gearbox adapters are synonymous with precision and premium quality. A design process based on 3D scanning and quality control using a coordinate measuring arm ensure a perfect fit. Manufacturing on state-of-the-art CNC machinery guarantees flawless concentricity between the engine and transmission, which is crucial for the longevity of the drivetrain.

Additional information

Installation manual

First install the gearbox adapter plate onto the engine, and then mate the engine with the gearbox. Bolt the flywheel to the crankshaft using the supplied bolts torqued to 120 Nm (88.5 lb⋅ft) with medium threadlocker applied. The release bearing and clutch fork are included in the kit – mount the clutch fork on the higher position of the release bearing, and shorten the release bearing from the Sachs XTend kit by 5 mm – as shown in the graphics below. The factory starter motor remains in use – BMW M50 / M52 / M54 (OE, not included in the kit).

Frequently Asked Questions

Which engines does this kit fit?

BMW inline 6-cylinder engines: M50 (M50B20, M50B25, M50TU), M52 (M52B20, M52B25, M52B28, M52TU), M54 (M54B22, M54B25, M54B30), S50 (S50B30, S50B32), S52 (S52B32), and S54 (S54B32).

Which gearboxes does this kit fit?

6-speed manual ZF GS6-53DZ transmissions from BMW M57N2 (E90 / E91 / E92 / E93 325d and 330d) in variants HGU (THGU) and HGK (THGK), as well as xDrive versions GS6X53DZ HGW (THGW) and HGL (THGL) – E9x 330xd. The transmission features a 32.5x35-26N spline.

Do I need to cut the gearbox bellhousing?

No. The adapter is engineered to eliminate cutting off the bellhousing – only an opening for the starter motor needs to be prepared.

What additional parts are required for installation?

A clutch slave cylinder dedicated to your specific gearbox. The original starter motor remains in use (BMW OE). These parts are not included in the kit. The PMC flywheel does not require an automatic version flexplate.

Which release bearing position should the clutch fork be installed on?

On the higher position of the release bearing included in the kit. Refer to the graphic in the "Installation manual" section for details.

Do I need to modify the release bearing?

Yes. When installing the twin-disc kit, the release bearing from the Sachs XTend kit must be shortened by 5 mm. The procedure is shown in the graphic in the "Installation manual" section.

Which clutch is included in the kit?

The Sachs XTend 3000 950 709 (3000.950.709-S) twin-disc clutch from the BMW E9x M3 V8 with a diameter of 215 mm (8.46"): self-adjusting pressure plate, two sprung organic clutch discs with a 32.5x35-26N spline (26 teeth) for the ZF GS6-53DZ gearbox, and a release bearing. The kit is complemented by a clutch fork.

What torque capacity can the Stage 2 kit handle?

The maximum torque capacity of the kit is 700 Nm (516 lb⋅ft).

Which starter motor should be used?

The factory BMW M50 / M52 / M54 starter motor – including BMW OE 12 41 1 466 102, 12 41 1 712 937, 12 41 1 715 238, 12 41 1 735 524, 12 41 1 738 602, 12 41 1 738 604, 12 41 1 740 375, 12 41 1 740 378, or 12 41 2 344 247. The starter motor is not included in the kit.

What is included in the kit?

An aluminum gearbox adapter plate (15 mm) with mounting hardware, custom PMC Motorsport aluminum flywheel for 215 mm twin-disc clutch with replaceable friction surface, crankshaft bolts, pressure plate bolts, and the Sachs XTend 3000 950 709 clutch kit (pressure plate, two discs, release bearing) with clutch fork. The clutch slave cylinder is not included in the kit.

Can I purchase only the adapter plate or only the flywheel?

Yes. Every component of the kit is available separately – including the adapter with flywheel only, without the clutch.

Does the price include customs duty for shipments outside the European Union?

No. The product price and shipping quote do not include import customs duties, tariffs, or local fees that may apply in the recipient's country.

Can I purchase with 0% VAT?

Yes, if you are a registered B2B customer outside of Poland with an active EU VAT number (validated via VIES) or if placing an export order outside the EU.

Is the included manual sufficient to complete the installation?

The manual covers mating the engine to the transmission outside the vehicle chassis. Depending on your car chassis, additional custom modifications may be required: engine mounts, crossmembers, firewall clearance, transmission tunnel modifications, driveshaft sizing. We strongly recommend professional installation.

Please note that a lightweight single-mass flywheel delivers uncompromising throttle response by eliminating factory dual-mass damping components. This results in a more direct drivetrain connection, which can naturally increase the audible operating noises of the transmission gears. This is a normal and sought-after characteristic in performance and motorsport applications resulting from the rigid mechanical connection between the engine and the drivetrain.