PMC Motorsport Stage 1 – clutch kit Honda K20 K24 – BMW N54 ZF GS6-53BZ 135i 335i 535i 6-speed manual – 240 mm / 9.45" – Sachs XTend 3000 951 952 – max. 650 Nm / 479 lb⋅ft

Complete Stage 1 clutch kit allowing the connection (swap / conversion) of the Honda K20 / K24 engine with the ZF GS6-53BZ 6-speed manual gearbox used in BMW with the N54 engine. The kit includes a gearbox adapter plate, custom PMC Motorsport flywheel, and Sachs XTend 3000 951 952 clutch – self-adjusting pressure plate, sprung organic clutch disc, and clutch release bearing with clutch fork. The maximum torque capacity of the kit is 650 Nm (479 lb⋅ft). The ideal solution for daily driving, drifting, as well as amateur and professional motorsport.

Planning a Honda K20 / K24 swap into your BMW (E30, E36, E46, E34, E39, E90, E91, E92, E60, E61, E81, E82, E87)? Our adapter plate is a reliable solution. Replace the automatic transmission with a BMW manual gearbox and unlock new possibilities.

PMC Motorsport adapters not only enable automatic-to-manual conversions in cars powered by the Honda K20 / K24 engine, but also support Honda K swaps into BMW and other platforms such as Nissan (S13, S14, S15, PS13) or Mazda RX-7 / RX-8.

Aluminum gearbox adapter plate designed to simplify gearbox installation as much as possible, avoiding radical procedures such as cutting off the entire bellhousing – only preparing a cutout for the starter motor is required. Custom flywheels dedicated to PMC Motorsport adapter plates are made of aluminum with a replaceable friction surface, inspected and balanced prior to shipment. Flywheel designed for a 240 mm clutch pressure plate (GS5-39DZ / GS6-53DZ / BZ BMW OE). Adapter plate thickness: 20 mm (0.78").

PMC Motorsport gearbox adapter plates are synonymous with precision and superior quality. The design process based on 3D scanning and inspection using a measuring arm ensure a perfect fit. Production on modern CNC machines guarantees ideal engine and transmission concentricity, which is crucial for powertrain durability.

Additional information

Installation manual

The gearbox adapter plate requires the use of a custom PMC Motorsport flywheel matched to the chosen gearbox – in this kit, a flywheel designed for a BMW 240 mm pressure plate paired with the ZF GS6-53BZ gearbox. To install the flywheel, Honda OE 90011-RBD-000 crankshaft bolts are required (not included), tightened to 118 Nm (87 lb⋅ft) using threadlocker. The clutch release bearing and clutch fork are included in the Sachs XTend kit – mount the clutch fork on the lower position of the release bearing (if using a dual-position bearing), and replace the original pivot pin with the custom pivot pin included in the kit. The clutch slave cylinder is not included in the kit – it must be selected to match your gearbox. To mount the adapter, use the original Honda K20 / K24 starter motor (OE, not included).

Frequently Asked Questions

Which engines does the kit fit?

Honda K20 (K20A, K20A1, K20A2, K20A3, K20A4, K20A6, K20Z1, K20Z2, K20Z3, K20Z4) and K24 (K24A1, K24A2, K24A3, K24A4, K24A8, K24Z1, K24Z2, K24Z3, K24Z4, K24Z5, K24Z6, K24Z7) engines.

Which gearboxes does the kit fit?

The ZF GS6-53BZ 6-speed manual gearbox from BMW with the N54 engine in HGX (E60 LCI 535i, E9x 335i), JGD (E9x 335i), JGK (E8x 135i, Z4 E89 35i) versions, as well as the GS6X53BZ HGY gearbox from xDrive versions (E60 LCI 535xi, E9x 335xi). The gearbox has a 32.5x35-26N spline.

Does the gearbox bellhousing need to be cut?

No. The adapter is designed to eliminate the need for cutting the bellhousing – only a cutout for the starter motor needs to be prepared.

What additional parts do I need to purchase for installation?

Honda OE 90011-RBD-000 crankshaft bolts, clutch slave cylinder dedicated to your gearbox, and original Honda K20 / K24 starter motor (OE). These parts are not included in the kit.

Which clutch is included in the kit?

Sachs XTend 3000 951 952 with a 240 mm (9.45") diameter: self-adjusting pressure plate, sprung organic clutch disc with 32.5x35-26N spline (26 teeth) for the ZF GS6-53BZ gearbox, and release bearing with clutch fork.

How much torque can the Stage 1 kit handle?

The maximum torque capacity of the kit is 650 Nm (479 lb⋅ft).

Can I use a different clutch?

Yes. The PMC Motorsport flywheel is designed for a 240 mm BMW OE style pressure plate – from BMW M57 / M57N / M57N2 (including the factory GS6-53DZ gearbox pressure plate) / N54 / B58 / E46 M3 or Sachs Performance 883082.001243. ACT / Spec / Tanaci clutches are also commonly used – any aftermarket pressure plate must fit a BMW OE flywheel (M57 / M57N / M57N2 / N54 / B58).

Which starter motor should be used?

Original Honda K20 / K24 starter motor (OE). The starter motor is not included in the kit.

Does the adapter also fit the ZF 8HP automatic transmission?

Yes. The PMC Motorsport gearbox adapter plate itself is universal and fits most BMW gearboxes (applies to adapters produced after 2022). When converting to a ZF 8HP automatic transmission, the standard flywheel must be replaced with a PMC Motorsport 8HP torque converter adapter.

What does the kit include?

Aluminum gearbox adapter plate with mounting bolts, custom PMC Motorsport flywheel with replaceable friction surface, pressure plate mounting bolts, custom pivot pin – replacement for BMW OE 21 51 1 223 328 – and Sachs XTend 3000 951 952 clutch kit (pressure plate, clutch disc, release bearing with clutch fork). The clutch slave cylinder is not included in the kit.

Can I buy just the adapter or just the flywheel?

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

Does the price include customs duties for shipping outside the European Union?

No. The product price and shipping quote do not include customs duties or additional fees that may apply in the destination country.

Can I purchase with 0% VAT?

Yes, if you are a B2B customer outside Poland with an active EU VAT number (verified via the VIES system) or ordering with export shipping outside the EU.

Is the included manual sufficient for installation?

The manual covers mating the engine to the gearbox outside the chassis. Depending on the car, additional modifications may be required: engine mounts, bushings, firewall, transmission tunnel, driveshaft length. We recommend professional installation.

It is worth remembering that a lightweight rigid flywheel provides uncompromising throttle response at the expense of eliminating factory damping elements. This translates into more direct drivetrain engagement, which may result in a natural increase in audible gearbox gear chatter/noise. This is a desirable characteristic in motorsport vehicles resulting from the rigid connection between engine and drivetrain.