Clutch Masters 09-13 BMW M3 4.0L Aluminum Flywheel
The Clutch Masters FW-148-AL is a lightweight single-mass flywheel for the E90, E92 and E93 BMW M3 with the 4.0L S65 V8 and the six-speed manual. Most buyers find it one of two ways: the factory dual-mass flywheel has started to rattle, clunk or shudder and is due for replacement anyway, or the owner wants the 8,300 rpm V8 to rev and rev-match faster on track. At 15 lb it is built to serve both the street car and the dedicated track car.
The factory part is a dual-mass flywheel, two masses joined by springs that soak up engine pulses before they reach the gearbox. It is heavy, and the internal springs and bearing wear out. FW-148-AL replaces it with one solid piece CNC machined in the USA from 6061 billet aluminum. After machining, each flywheel is checked for tolerance and hard anodized to protect the mating surfaces and threads. It is then fitted with a replaceable steel friction insert and a ring gear with an integrated trigger, and inspected before boxing.
The steel insert is the part your clutch disc actually rides on. When it wears, the insert can be replaced instead of machining the flywheel. Clutch Masters lists the flywheel as SFI certified, CNC machined and precision balanced. Less rotating mass lets the S65 gain and drop rpm faster, which is what makes heel-toe downshifts easier to match.
Many of these noises can come from somewhere else, so check before ordering. A worn release bearing whines or chirps with the pedal down, a tired drivetrain or engine mount clunks under load, and a slipping disc shows as rpm rising faster than road speed. Our slipping diagnosis guide covers the slip test. With the gearbox out, a shop can measure dual-mass free play and rock against the manufacturer limit, which is the real deciding test.
We list this flywheel for the 2009 through 2013 BMW M3 4.0L, the E90 sedan, E92 coupe and E93 convertible with the S65 V8 and the six-speed manual transmission. It is not for cars with the seven-speed M-DCT dual-clutch gearbox. If you have a 2008 car or an engine or gearbox swap, send us your year and VIN so we can confirm it matches. Clutch Masters says the flywheel accepts the factory clutch kit or any of its FX Series single disc kits. Clutch Masters also offers a twin disc package built around a factory cover and an FX series stage for owners who need more holding power. More clutch hardware is in our rebuild kits category.
| Brand | Clutch Masters |
| Part number | FW-148-AL |
| Fits | Clutch Masters 09-13 BMW M3 4.0L Aluminum Flywheel |
| Vehicle fitment | BMW M3 (2009-2013) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Clutch Masters lists it at 15 lb, a weight it says works for everything from street cars to full race cars.
Yes. Clutch Masters says the flywheel accepts the factory clutch kit or any of its FX Series single disc clutch kits.
No. It is for the six-speed manual S65 cars. The dual-clutch M-DCT cars use a different setup.
Likely, yes. A single-mass flywheel does not have the dual-mass springs, and Clutch Masters says lighter flywheels produce more gear noise.
The friction surface is a replaceable steel insert, so when it wears you replace the insert instead of machining the aluminum body.
Plan on a disc, pressure plate and release bearing if the originals are worn, new flywheel bolts, and fresh brake fluid for the clutch hydraulics.
