Clutch Masters Steel Flywheel - E60 M5, E63 M6 SMG - Blemished Item

Blemished Item: Part was installed once, but not used.  Minor surface rust from sitting around.

Upgrading to a lightweight steel flywheel on your E60 M5 or E63 M6 has many advantages:
 

• Eliminate potential failures from the original Dual-Mass Flywheel
• Faster revs from less rotational mass
• More power to the wheels

Clutch Masters offers Aluminum or Steel SMF depending on the application. We recommend you replace your DMF with a steel flywheel if the vehicle will be driven on the street since it will produce less noise and will be more pleasant to drive on the street. Aluminum flywheels are only recommended for track applications or ultimate performance.

Even made of steel, this flywheel is still lighter than the stock dual-mass. With less mass to spin, the steel flywheel returns horsepower and torque to the engine. Less power is needed to spin the flywheel and clutch. While engine horsepower doesn't change, more power makes its way to the wheels, making the car faster at all RPM and any speed. This is especially appreciated in a car like the V10 M5/M6 that lacks torque. The engine can also rev faster to get you into the power band, and turbo boost, sooner.

The stock dual-mass flywheel (DMF) is a normal wear item. The DMF is made up to two halves with rubber and grease between them. Track use, hard launches, and abuse will decrease its usable life. If not replaced preventatively the DMF breaking apart inside the bellhousing - the two flywheel halves separate, the clutch breaks apart, and grease is scattered everywhere. The transmission usually survives a DMF failure but spinning ring gears have been known to slice through bellhousings. The DMF should be replaced about every other clutch job under ideal normal circumstances.

Abusing the clutch on a stock DMF will leave clutch material deposits on the surface and excess heat may warp the material or burn up the lubricating grease. The clutch surface on a DMF is usually not thick enough for it to be machined, requiring replacement of the whole flywheel. 

An aluminum flywheel does have some drawbacks that you need to be made aware of:
- Engine revs drop quicker. A heavier flywheel will stay spinning while the aluminum loses revs faster. Most drivers adapt quickly and it becomes a non-issue. In fact, going back to a heavier DMF, such as when driving a student's car at a driving school, is a downgrade that makes them appreciate their aluminum flywheel more.
- Part of the reason a DMF was installed in the first place was to dampen and absorb driveline vibrations and noise. The two plates suspended in rubber do a great job of smoothing out engine vibrations. A lighter steel flywheel has less dampening in comparison but is better than aluminum. Drivetrain noise is more noticeable and may irritate some drivers and passengers.

Clutch Masters is the authority on performance clutch and flywheel innovation. With decades of experience in all forms of motorsport, including drag racing and drifting, Clutch Masters has the expertise to design and develop BMW clutch and flywheel upgrades that are overbuilt for their intended use. They apply the same approach for bulletproof performance for a BMW engine as they do for a 900hp drag car. All of their flywheels are SFI certified for use in motorsports.

For SMG transmission only.