PMC Motorsport adapter / conversion kit Honda K20 K24 – BMW ZF 8HP 8HP50 8HP51 8HP70 8HP75 8HP76
Adapter enabling the connection (swap / conversion) of the Honda K20 / K24 engine in a longitudinal layout with the modern 8-speed automatic transmission ZF 8HP (ZF Friedrichshafen) sourced from BMW – 8HP50 / 8HP51, 8HP70, 8HP75, and 8HP76, in RWD and xDrive versions. The adapter is designed for ZF 8HP transmissions with a small bellhousing and a 6-bolt torque converter pattern. The kit includes an aluminum gearbox adapter plate with mounting bolts and a reinforced torque converter adapter with a starter ring gear.
Planning a K-swap into a rear-wheel-drive car and looking for a durable, modern automatic transmission? The ZF 8HP provides 8 gears, ultra-fast shift times (approx. 0.2 s), and high strength – an excellent combination with the high-revving Honda K20 / K24 engine, both for daily driving and motorsport.
In our offer, you will also find an 8HP shifter / gear lever and a TCU controller with wiring harness to control the ZF 8HP transmission.
The aluminum gearbox adapter plate has been designed to make installing the ZF 8HP transmission as straightforward as possible. The reinforced torque converter adapter with starter ring gear (included) connects the Honda K engine crankshaft to the torque converter of your ZF 8HP gearbox – no automatic version flexplate is required. Gearbox adapter plate thickness: 20 mm (0.78").
PMC Motorsport gearbox adapters are synonymous with precision and premium quality. A design process based on 3D scanning and quality control using a measuring arm ensure a perfect fit. Production on state-of-the-art CNC machines guarantees ideal concentricity between the engine and transmission, which is crucial for the durability of the drivetrain.
All of our manufacturing and R&D design department are located in Poland. Over 90% of components are manufactured in-house by our company.
Selection assistance and after-sales support – PMC Motorsport Support
The PMC Motorsport team will help you choose the right kit and provide technical support in case of any doubts during installation. You can contact us via the contact form.
Purchasing individual components
Every component of the kit can be purchased separately.
Thousands of manufactured adapters and satisfied customers worldwide.
PMC Motorsport adapters are used both in daily drivers and in professional motorsport projects.
From the beginning, we focus on the quality of manufactured parts. The component is inspected after every production stage. Each part produced by us is engraved with a production serial number.
Quality confirmed by PN-EN ISO 9001:2015 certificate.
We ship our products practically to all countries worldwide. For European Union countries (excluding islands) and the United Kingdom, shipping costs are calculated automatically. For countries outside the list, after placing an order, our team will prepare a shipping calculation and add it to your order. You will receive an email with the total order cost.
NOTE: The provided shipping quote along with the product price does not include customs duties / import taxes, which may apply depending on the destination country.
0% VAT
0% VAT for customers with an active EU VAT number (option for B2B customers outside Poland) and in the case of export outside EU borders.
Upon positive verification in the VIES system, we modify the order by removing the charged VAT.
| Compatible engines: |
Honda K20
K20A, K20A1, K20A2, K20A3, K20A4, K20A6
K20Z1, K20Z2, K20Z3, K20Z4
Honda K24
K24A1, K24A2, K24A3, K24A4, K24A8
K24Z1, K24Z2, K24Z3, K24Z4, K24Z5, K24Z6, K24Z7
|
| 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 performed by professionals experienced in engine swaps and vehicle modifications – in workshops and using properly suited tools.
The adapter installation manual covers only the basic knowledge required to physically mate the engine and transmission outside the vehicle body.
Depending on the specific car, additional modifications may be required, such as adapting engine mounts, bushings, firewall, transmission tunnel, driveshaft length, etc.
We manufacture our adapters from fully recyclable materials.
Installation manual
The gearbox adapter plate is installed first onto the engine. The reinforced torque converter adapter with starter ring gear (included) is bolted to the crankshaft using Honda K OE 90011-PNA-B00 bolts (not included), and then connected to the torque converter of your ZF 8HP gearbox (6 converter bolts).
To mount the adapter, use the original Honda K starter motor (OE, not included).
Frequently Asked Questions
Which engines does this adapter fit?
It fits Honda K20 (K20A, K20A1–A4, K20A6, K20Z1–Z4) and K24 (K24A1–A4, K24A8, K24Z1–Z7) engines mounted longitudinally in rear-wheel-drive (RWD) applications.
Which transmissions does the adapter fit?
To 8-speed automatic ZF 8HP transmissions from BMW: 8HP50 / 8HP51 (BMW B37, B38, B46, B47, B48, B58), 8HP70 and 8HP75 (BMW N57, B57), and 8HP76 (BMW B57, S58), in RWD and xDrive versions. The complete list of versions is provided in the table above.
How to connect the ZF 8HP torque converter to the Honda K20 / K24 engine?
Using the PMC Motorsport reinforced torque converter adapter with starter ring gear included in the kit. The torque converter adapter bolts to the Honda K engine crankshaft using Honda K OE 90011-PNA-B00 bolts, and then connects to the torque converter of your ZF 8HP gearbox. An automatic version flexplate is not required.
What additional parts do I need to purchase for installation?
Honda K OE 90011-PNA-B00 crankshaft bolts to mount the torque converter adapter and the original Honda K (OE) starter motor. To control the transmission, you will also need a TCU controller with wiring harness and an 8HP shifter – both items are available in our offer. These parts are not included in the kit.
What bolts are required to fasten the torque converter adapter?
Honda K OE 90011-PNA-B00 bolts. The bolts are not included in the kit.
Which starter motor should be used?
The original Honda K (OE) starter motor. The starter motor is not included in the kit.
What is included in the kit?
Aluminum gearbox adapter plate (20 mm) with mounting bolts and reinforced torque converter adapter with starter ring gear.
Does the price include customs duty for shipping outside the European Union?
No. The product price and shipping quote do not include customs duties or import taxes that may occur in the destination country.
Can I buy with 0% VAT?
Yes, if you are a B2B customer outside Poland with an active EU VAT ID (verified in the VIES system) or for orders exported outside the EU.
Is the included manual sufficient for installation?
The manual describes mating the engine and gearbox outside the vehicle body. Depending on the car, additional modifications may be required: mounts, bushings, firewall, transmission tunnel, driveshaft length. We recommend installation by professionals.
