PMC Motorsport flywheel Honda K20 K24 – 6-speed manual BMW N54 ZF GS6-53BZ 135i 335i 535i – Ø240 mm / 9.45"

Custom PMC Motorsport flywheel designed to connect the Honda K20 / K24 engine with the ZF GS6-53BZ 6-speed manual gearbox used in BMW N54 models (E8x 135i, E9x 335i, E60 LCI 535i, Z4 E89 35i) – including the xDrive GS6X53BZ HGY (E9x 335xi, E60 LCI 535xi) version. The flywheel works in conjunction with the PMC Motorsport F0BMW-K (20 mm) universal gearbox adapter plate.

Are you planning a Honda K20 / K24 swap in your BMW (E30, E36, E46, E34, E39, E90, E91, E92, E60, E61, E81, E82, E87) or in another rear-wheel drive car, such as a Nissan S13 / S14 / S15 or Mazda RX-7 / RX-8? The PMC Motorsport flywheel together with the adapter allows you to utilize a heavy-duty 6-speed BMW gearbox in your project.

The PMC Motorsport flywheel is made of aluminum and features a replaceable friction surface. Every flywheel is inspected and dynamically balanced prior to shipping. Engineered for a 240 mm (9.45") BMW OE type clutch pressure plate from the GS6-53DZ / GS6-53BZ. This rigid single-mass flywheel (SMF) delivers sharp and immediate engine throttle response.

PMC Motorsport parts 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

The flywheel requires the use of the PMC Motorsport F0BMW-K gearbox adapter plate (thickness 20 mm / 0.78"). Installing the flywheel requires genuine Honda OE 90011-RBD-000 crankshaft bolts (not included in the kit), torqued to 118 Nm (87 lb⋅ft) using medium threadlocker. Mount the clutch fork in the lower position on the release bearing (when using a dual-position release bearing), and replace the original pivot ball with the pivot pin supplied in the kit. The original Honda K20 / K24 starter motor (OE, not included in the kit) must be used.

Frequently Asked Questions

Which engines does this flywheel fit?

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

Which gearboxes does this flywheel fit?

The 6-speed manual ZF GS6-53BZ transmission from BMW N54 models in variants HGX (THGX) – E9x 335i and E60 LCI 535i, JGD (TJGD) – E9x 335i, JGK (TJGK) – E82 / E88 135i and Z4 E89 35i – as well as the xDrive version GS6X53BZ HGY (THGY) – E9x 335xi and E60 LCI 535xi.

Is a gearbox adapter plate required?

Yes. The flywheel works with the PMC Motorsport F0BMW-K universal gearbox adapter plate (20 mm), which is not included in the kit.

Which starter motor should be used?

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

Which clutch pressure plate fits the PMC flywheel?

A 240 mm (9.45") BMW OE type pressure plate, such as BMW OE 21 21 7 620 467, 21 21 7 559 864, 21 21 7 545 068 or Sachs Performance 883082.001243. ACT / Spec / Tanaci clutches are also commonly used – any aftermarket pressure plate must match the BMW OE flywheel pattern (M57N / M57N2 / N54 / B58).

Which clutch disc should be used?

A 240 mm clutch disc with a 32.5x35-26N spline (26 teeth) for the GS6-53BZ / GS6-53DZ gearbox, e.g. BMW OE 21 20 7 583 172, 21 20 7 526 516, 21 20 7 567 839, 21 21 4 470 095, 21 21 7 598 459, 21 21 7 598 492, 21 21 7 609 330, 21 21 7 609 945 or 21 21 8 619 872. The clutch disc is not included in the kit.

What parts do I need to purchase separately for installation?

The PMC Motorsport F0BMW-K gearbox adapter plate, Honda OE 90011-RBD-000 crankshaft bolts, clutch pressure plate and clutch disc, release bearing with 2-position clutch fork (BMW OE 21 51 7 564 027), clutch slave cylinder (BMW OE 21 52 6 775 924 / 21 52 6 785 964 / 21 52 1 158 903 / 21 52 6 766 277), and an original Honda K20 / K24 starter motor. These parts are not included in the kit.

What is included in the kit?

The custom PMC Motorsport flywheel with replaceable friction surface, pressure plate mounting bolts, and a clutch pivot pin / clutch fork support pin.

Does the PMC flywheel need additional balancing?

Every PMC Motorsport flywheel is balanced prior to shipping. When assembling with custom aftermarket clutch kits, an additional balance check of the entire assembly is recommended.

Can I purchase only the flywheel or individual components?

Yes. Every component of our kits can be purchased separately.

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

No. The product price and shipping quote do not include customs clearance fees, import duties, or local taxes 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.