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Flywheels

The factory BMW flywheel is a 2 piece design that mitigates vibration and creates a comfortable driving experience. A single piece aftermarket flywheel will allow the engine to rev quicker and gives shifting a much more direct and mechanical feel. This also makes clutch modulation on spirited takeoffs much easier and more predictable and is a must if you plan on tracking or competing in your BMW.

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Team MFactory Chromoly-Nitride Racing Flywheel - 6-Bolt

For vehicles with DTC transmission only

T#:12118971

Part#: MF-TRS-09E92ADCT

In Stock

$ 515.99 USD

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$ 515.99 USD

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Achieve increased throttle response and acceleration with the MFactory range of single-piece Lightweight Flywheels Diamond Cut to exacting tolerances from Forged Chromium-Molybdenum Steel Perfect fitment & finish ensures hassle-free installation Designed using leading-edge Solidworks 3D CAD & Cosmos FEA software Advanced Geometry minimizes parasitic drivetrain losses. Race transmissions built with MFactory components transfer, on average, 1-2% more power to the ground over competitors! Precision Balanced to over 12000rpm Ensures the utmost reliability from our Lightweight Flywheels, which are specifically designed to reduce weight and inertia for improved engine response and acceleration Specifications Made from imported Japanese SAE 4140 Steel Forged, Double Tempered and Super Sub-Zero treated for unsurpassed toughness Proprietary Nitride surface treatment for increased surface hardness

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Lightweight Aluminum Flywheel (12lbs) N14 1.6L Engine

T#:26404876

Part#: SB09A-2

Ships in 3 Business Days

$ 529.00 USD

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$ 529.00 USD

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SPEC billet flywheels offer precise engineering tailored to specific driving environments, ensuring optimal performance for each vehicle. Made from high-quality steel and aluminum, SPEC flywheels boast a .001 machine tolerance, guaranteeing a flat seating surface for the clutch and smooth rotational qualities. These flywheels are essential for converting OE Dual Mass to Single Mass for compatibility with Spec Design clutch Kits.

Benefits:

Precision engineering for specific driving environments
Manufactured from high-quality steel and aluminum
Flat seating surface for the clutch ensures smooth operation
Compatible with Spec Design clutch Kits

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SPEC Aluminum Flywheel (SMF) (FOR USE WITH SPEC CLUTCH ONLY) 135 N55 ...

T#:597417

Part#: SB55A-2

Ships in 3 Business Days

$ 637.00 USD

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$ 637.00 USD

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MINI R52 R53 Lightweight Aluminum Flywheel (12lbs)

T#:31191877

Part#: SB09A

Ships in 3 Business Days

$ 499.00 USD

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$ 499.00 USD

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MINI R52 R53 Lightweight Aluminum Flywheel (12lbs) enhances the performance of the MINI with its precision engineering and lightweight design. This flywheel, manufactured by SPEC, is tailored for specific driving environments, making it ideal for both daily driving and high-performance applications.

Lightweight Design: Weighs approximately 12 lbs, reducing rotational mass for quicker engine response and improved acceleration.
High-Quality Construction: Made from premium steel and aluminum, ensuring durability and a flat seating surface for the clutch.
Precision Engineering: Manufactured to a .001 machine tolerance for smooth rotational qualities and perfect balance.
Performance Upgrade: Essential for converting from OE dual mass to single mass when used with SPEC Design clutch kits.
Versatile Application: Suitable for various driving habits and racing or high-performance setups.

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JB Racing Lightweight Steel Flywheel - Grand-Am Legal - E46, MZ3, Z4 ...

T#:40748575

Part#: 520010240SGA

Ships on Sep 3, 2026

$ 868.00 USD

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$ 868.00 USD

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This lightened steel flywheel is specifically designed (and approved) for use in Grand-Am road racing but can also be used as a mild street upgrade if a full aluminum lightweight flywheel is not called for. The Grand-Am flywheel is 20% lighter than stock to meet the rules for the GS and ST classes.Modern flywheels are built with additional components and features that are designed to dampen and minimize vibrations from the engine and transmission. As a result they have become bloated in weight and that means more energy is used up just making the flywheel spin. A lightweight flywheel does away with the dual mass design and its additional mass so more energy can be diverted to where it counts most - moving the car. The flywheel and clutch is one of the first areas that engine builders address when making the rotating assembly lighter for race engines. The dampening effect is just not needed on cars that are focused on performance.

In addition to releasing more power to the wheels, the lighter flywheel allows the engine to spin more freely, which improves throttle response. The engine revs much faster than before. With the engine spinning easier the power band comes up much sooner. The stock steel flywheel feels lazy in comparison. There is a driving adjustment required to get used to how much faster the engine revs but that's not really a downside.

Grand-Am approved this flywheel to be used with a factory E36 M3 clutch. This opens up a lot of clutch and pressure plate options but we typically used this with a stock Sachs OEM clutch kit. This makes replacement clutch components easy to source and inexpensive when compared to specialized racing clutches.

Lightweight flywheels are considered 'single-mass' flywheels because they do not have the same dampening designs as an original 'dual-mass' flywheel. With a single-mass design more noise and vibration may be noticeable. There are steps you can take to minimize the noise - heavier weight transmission oil and clutch discs with anti-rattle springs (sprung-hub clutch). In addition to the standard replacement clutches, we also sell Sachs Performance sprung hub clutches that also work with the JB flywheels.

If being used on a 330i 6-speed or Z4 6-speed an additional pilot bearing hub is required. Select your appropriate model and transmission from the list below.

Stock Flywheel Weight = 25.0lbs
JB Flywheel Weight = 20.0lbs

This item fits the following BMWs:
2001-2002 E46 BMW 330i 330ci 5-speed
2003-2006 E46 BMW 330i 330ci 6-speed
2001-2006 E46 BMW M3
1998-2002 Z3 BMW Z3 M Roadster M Coupe
2003-2005 E85 BMW Z4 2.5i Z4 3.0i

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Flywheels

Sub-Categories

Team MFactory Chromoly-Nitride Racing Flywheel - 6-Bolt

Lightweight Aluminum Flywheel (12lbs) N14 1.6L Engine

Benefits:

SPEC Aluminum Flywheel (SMF) (FOR USE WITH SPEC CLUTCH ONLY) 135 N55 ...

MINI R52 R53 Lightweight Aluminum Flywheel (12lbs)

JB Racing Lightweight Steel Flywheel - Grand-Am Legal - E46, MZ3, Z4 ...

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