Adapter Toyota 1JZ 2JZ - 6-speed manual BMW N54 GS6-53BZ 135i 335i 535i - 184mm / 7.25" (S)

PMC Motorsport adapter plate / conversion kit / clutch kit Toyota JZ 1JZ 2JZ – 6-speed manual BMW N54 ZF GS6-53BZ 135i 335i 535i – 184 mm / 7.25" STEP (Ultralight Race) – 3.4 kg / 7.5 lbs

Adapter plate enabling the connection (swap / conversion) of the Toyota JZ 1JZ 2JZ engine with the manual 6-speed ZF GS6-53BZ gearbox used in BMW with the N54 engine. Kit with an Ultralight Race flywheel for multi-disc 184 mm (7.25") STEP type clutches – an ideal solution for drift as well as amateur and professional motorsport.

Are you planning an engine swap of the Toyota JZ 1JZ 2JZ into your BMW (E30, E36, E46, E34, E39, E90, E91, E92, E60, E61, E81, E82, E87)? Our adapter plate is a reliable solution. Swap the automatic transmission for a BMW manual gearbox and unlock new possibilities.

PMC Motorsport adapters are not only for converting automatic transmissions to manuals in vehicles with the Toyota JZ 1JZ 2JZ engine, but also provide support for completing a JZ swap in BMW and other vehicles, such as Nissan (S13, S14, S15, PS13) or Mazda RX-7 / RX-8.

The aluminum gearbox adapter plate is designed to simplify gearbox installation as much as possible, avoiding radical steps like cutting off the entire bellhousing – only preparing the starter motor clearance is required. Custom flywheels dedicated to PMC Motorsport adapters are made of aluminum with a replaceable steel friction surface, inspected and balanced before shipment. The Ultralight Race flywheel is designed for 184 mm (7.25") STEP clutches – using Tilton OT-II Cerametallic 7.25" twin-disc (66-302xxx) and triple-disc (66-003xxx) pressure plates as a design standard. Flywheel weight: 3.4 kg (7.5 lbs), adapter thickness: 20 mm (0.78"). The small clutch diameter and low system mass ensure instant engine throttle response.

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

Additional information

Installation instructions

For flywheel installation, it is necessary to use the automatic transmission starter ring gear (flexplate) Toyota OE 32101-30090 or 32101-22050 and a 4.5 mm spacer between the engine block and flexplate, Toyota OE 32116-22020 (not included in the kit). Bolt the flywheel to the crankshaft using the included bolts tightened to 72 Nm (53.1 lb⋅ft) with threadlocker. Set the release bearing to the appropriate position and shorten the gearbox guide tube – according to the diagrams below. A Toyota JZ starter motor without an additional pinion cover must be used for mounting – details in the FAQ section.

Frequently Asked Questions

Which engines does this adapter fit?

For Toyota JZ family engines: 1JZ (1JZ-FSE, 1JZ-GE, 1JZ-GTE) and 2JZ (2JZ-FSE, 2JZ-GE, 2JZ-GTE), in VVT-i and non VVT-i versions.

Which gearboxes fit the adapter?

For the 6-speed manual ZF GS6-53BZ gearbox from BMW with N54 engines in HGX, JGD, JGF, JGK versions (E60 535i, E9x 335i, E8x 135i, Z4 35i) and GS6X53BZ HGY.

Do I need to cut the gearbox bellhousing?

No. The adapter was designed to avoid cutting the bellhousing – you only need to prepare the clearance hole for the starter motor.

Which additional parts do I need to buy for installation?

Automatic transmission starter ring gear (flexplate) Toyota 1JZ / 2JZ, OE 32101-30090 or 32101-22050, and one 4.5 mm spacer between the engine block and flexplate, Toyota OE 32116-22020. These are not included in the kit.

Which clutch fits the PMC flywheel?

The Ultralight Race flywheel is designed for 184 mm (7.25") STEP clutches. The design standard was Tilton OT-II Cerametallic 7.25" pressure plates – twin-disc 66-302xxx and triple-disc 66-003xxx. Clutch discs must have a 32.5x35-26N spline (26 teeth) for the ZF GS6-53BZ gearbox. Clutch pressure plate, discs, release bearing, clutch release fork, and slave cylinder are not included in the kit.

Do I need to modify the gearbox?

Yes. When installing a 184 mm clutch, the gearbox guide tube must be shortened. The method is shown in the diagram in the "Installation instructions" section.

Is this kit suitable for a daily driver?

No. The Ultralight Race flywheel with a multi-disc 7.25" clutch is intended for motorsport and drift. For daily driver vehicles, we recommend the adapter version with a flywheel designed for a 240 mm BMW clutch pressure plate.

Which starter motor should be used?

Toyota JZ starter motor without an additional pinion cover. The mounting method depends on the adapter version:

a) adapters produced up to 2022 – starter motor installs identically to the original equipment (OE);

b) adapters produced from 2022 to 2025 – one of the starter mounting holes in the engine block must be drilled out to ∅12.9–13.2 mm (0.507"–0.520") to a depth of 22 mm (0.866"), then use the sleeve from the AN 335-M10 kit and bolt with ISO 4762-M10x35 bolt;

c) adapters manufactured from January 2025 – the lower mounting hole in the starter motor must be enlarged to ∅12–13 mm diameter and the engine block tapped to M12x1.5.

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 is included in the kit?

Aluminum gearbox adapter plate with mounting bolts, PMC Motorsport Ultralight Race 184 mm custom flywheel with replaceable steel friction surface (3.4 kg / 7.5 lbs), crankshaft bolts, and clutch pressure plate mounting bolts. Clutch, release bearing, clutch release fork, and slave cylinder are not included in the kit – they must be selected for your specific gearbox.

Can I buy only the adapter or only the flywheel?

Yes. Every component of the kit is available separately.

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

No. The product price and shipping estimate do not include customs duties or additional fees that may apply in the recipient's country.

Can I buy with 0% VAT?

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

Are the included instructions sufficient for installation?

The instructions describe connecting the engine to the gearbox outside the car body. Depending on the vehicle, additional modifications may be required: mounts, bushings, firewall, gearbox tunnel, driveshaft length. We recommend installation by professionals.

It is worth remembering that a lightweight rigid flywheel provides uncompromising throttle response at the expense of eliminating factory damping elements. This translates into a more direct drivetrain operation, which may result in a natural increase in the audibility of gearbox mechanisms. This is a desirable characteristic in sports vehicles, resulting from a rigid connection between the engine and the drive.