Add products by adding codes
Adapter Kit BMW N54 - BMW ZF 8HP 8HP75 8HP70 8HP50 8HP51
- Aluminum adapter kit enabling the connection (swap / conversion) of BMW N54 engines with an automatic ZF 8HP gearbox (ZF Friedrichshafen)
In a set
PMC Motorsport adapter plate / conversion kit BMW N54 N54B30 (8-bolt crankshaft) – BMW ZF 8HP 8HP50 8HP51 8HP70 8HP75 8HP76
Adapter plate allowing the connection (swap / conversion) of the BMW N54 / N54B30 3.0 biturbo engine (8-bolt crankshaft version) with the modern 8-speed automatic transmission ZF 8HP (ZF Friedrichshafen) from BMW – 8HP50 / 8HP51, 8HP70, 8HP75, and 8HP76, in both RWD and xDrive versions. The adapter plate is designed for ZF 8HP transmissions with a small bellhousing and a torque converter mounted with 6 bolts. The kit includes an aluminum gearbox adapter plate and a reinforced torque converter adapter with a starter ring gear.
Want to replace the 6-speed manual or automatic transmission in your BMW with an N54 engine (e.g. E9x 335i, E8x 135i, E60 535i, Z4 E89 35i) with a modern ZF 8HP automatic? Or planning an N54 swap into another rear-wheel-drive platform? The ZF 8HP offers 8 gears, lightning-fast shift times (approx. 0.2 s), and exceptional torque capacity – the ideal pairing for the powerful N54, whether for daily driving, drifting, or competitive motorsport.
In our catalog, you will also find an 8HP shifter / gear selector and a standalone TCU controller with wiring harness for operating the ZF 8HP transmission.
The aluminum gearbox adapter plate has been engineered to make installing the ZF 8HP transmission as straightforward as possible. The reinforced torque converter adapter with starter ring gear (included in the kit) mates the N54 crankshaft directly to the torque converter of your ZF 8HP transmission – an OEM automatic flexplate is not required. Gearbox 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.
Our entire production and R&D design department are located in Poland. Over 90% of components are manufactured in-house.
Selection assistance and after-sales support – PMC Motorsport Support
The PMC Motorsport team will help you choose the right kit, and in case of questions during installation, we provide technical support. You can contact us via the contact form.
Purchase of individual components
Every single element of our kit is available for purchase separately.
Thousands of manufactured adapter plates and satisfied customers worldwide.
PMC Motorsport adapters are used in daily drivers as well as in professional motorsport projects.
From the beginning, we focus on the quality of our manufactured parts. After each production stage, the component is inspected. Every sub-assembly manufactured by us is engraved with a production serial number.
Quality confirmed by the PN-EN ISO 9001:2015 certificate.
We ship our products to virtually all countries worldwide. European Union countries (excluding islands) and the United Kingdom have shipping calculated automatically. For countries not on the list, after placing an order, our team will prepare a shipping calculation and add it to the order. You will receive an email with the total order cost.
NOTE: The provided shipping quote along with the product price does not include additional fees / customs duties that may apply depending on the destination country.
0% VAT
0% VAT for Customers with an active European VAT number (B2B option for customers outside Poland) and for export outside the EU.
After successful verification in the VIES system, we update the order by removing the charged VAT.
| Compatible engines: |
BMW N54 BMW N54B30 (8-bolt crankshaft) |
| Compatible automatic transmissions: |
ZF 8HP50 / 8HP51 8-speed ZF 8HP50 GA8HP50Z – BMW B37, B38, B48, B58 (F-series) ZF 8HP51 GA8HP51Z – BMW B46, B47, B48, B58 ZF 8HP70 / 8HP75 / 8HP76 8-speed (RWD / xDrive) ZF 8HP70 GA8HP70Z / GA8HP70X – BMW N57 / N57N (F-series) ZF 8HP75 GA8HP75X – BMW N57 / N57N xDrive (F-series) ZF 8HP75 GA8HP75Z / GA8HP75X – BMW B57 (G-series) ZF 8HP76 GA8HP76Z / GA8HP76X – BMW B57 (G-series, RWD / xDrive) ZF 8HP76 GA8HP76Z / GA8HP76X – BMW S58 (G-series) |
Additional information
PMC Motorsport parts are intended for motorsport and racetrack use.
Installation should be carried out by professionals with expertise in engine swaps and vehicle modifications – in specialized workshops using properly adapted tools.
The adapter installation manual covers only the basic knowledge required to physically mate the engine to the gearbox outside the vehicle chassis.
Depending on your specific vehicle, additional modifications may be required, such as: adjusting mounts, engine bushings, firewall, transmission tunnel, driveshaft length, etc.
Our adapter plates are made from fully recyclable materials.
Installation manual
Mount the gearbox adapter plate to the engine block first. Fasten the reinforced torque converter adapter with starter ring gear (included in the kit) to the crankshaft using the supplied bolts with threadlocker, and then bolt it to the torque converter of your ZF 8HP transmission (6 converter bolts).
To mount the adapter plate, use the original BMW N54 starter motor (OE, not included).
Frequently Asked Questions
Which engines does this adapter fit?
BMW N54B30 engines in the 8-bolt crankshaft version – found in the BMW E9x 335i, E8x 135i, E60 535i, and Z4 E89 35i.
Which transmissions does the adapter fit?
8-speed ZF 8HP automatic transmissions from BMW: 8HP50 / 8HP51 (BMW B37, B38, B46, B47, B48, B58), 8HP70 and 8HP75 (BMW N57, B57), and 8HP76 (BMW B57, S58), in both RWD and xDrive versions. See the table above for the complete list.
How is the ZF 8HP torque converter connected to the BMW N54 engine?
Using the reinforced PMC Motorsport torque converter adapter with starter ring gear included in the kit. The converter adapter bolts directly to the N54 crankshaft, then connects to the torque converter of your ZF 8HP transmission. An OEM automatic flexplate is not needed.
What additional parts do I need to purchase for installation?
An original BMW N54 starter motor (OE). To control the transmission, you will also need a standalone TCU controller with wiring harness and an 8HP gear selector/shifter – both are available in our catalog. These parts are not included in the kit.
Which starter motor should be used?
Original BMW N54 starter motor (OE). The starter motor is not included in the kit.
What does the kit include?
Aluminum gearbox adapter plate (20 mm) with mounting bolts, reinforced torque converter adapter with starter ring gear, and crankshaft bolts.
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.