Clutch Masters 21-22 BMW G80 M3/G82 M4 S58 6-Speed Lightweight Aluminum Flywheel
Clutch Masters FW-1921-AL is a lightweight billet aluminum flywheel for the six-speed manual BMW G80 M3 sedan and G82 M4 coupe with the 3.0L twin-turbo S58. It is aimed at owners who have tuned the car, are replacing a worn or slipping clutch, and want the engine to rev up and settle faster between shifts on track or on a back road.
BMW launched the G80 and G82 with two drivetrains: the base rear-drive M3 and M4 with a six-speed manual, and Competition models with an eight-speed automatic. This flywheel is only for the manual cars. It replaces the heavy factory flywheel with a single piece machined from 6061 billet aluminum, which cuts rotating mass. The engine picks up rpm more quickly, downshift rev-matches happen faster, and the car feels sharper off a corner. The trade-off with any light single-mass flywheel is more gear rattle at idle and a little less forgiveness when pulling away slowly.
Clutch Masters lists FW-1921-AL alongside its Factory Fit FX series twin disc kits for the S58, which use the same style of aluminum flywheel. We stock those complete kits as well: the FX350 twin disc and the FX400 6-puck twin disc for higher power. Buying the flywheel alone makes sense when you are replacing a damaged flywheel under one of those kits or building a matched setup.
On a car this new, rule out the simple things first. A soft pedal or grinding into gear points to the clutch hydraulics, not the flywheel. Slip shows as rpm rising without matching road speed in a full-throttle pull in third or fourth. Our slipping diagnosis guide walks through that test, and shift flare vs. slip helps separate a clutch problem from other drivability issues. With the transmission out, check the friction face for heat cracks and blue spots.
Our listing covers the 2021-2022 BMW G80 M3 and G82 M4 with the S58 and six-speed manual. Clutch Masters' current listing extends the same part to 2021-2024 manual cars. Competition, xDrive, CS and CSL models with the automatic do not use a flywheel of this type and will not accept it. BMW has since announced a manual M3 CS for the end of G80 production; it is not part of this listing, so confirm with us first. Match the part number FW-1921-AL, or send your year and VIN and we will verify it before it ships. Other clutch hardware is in our rebuild kits section.
| Brand | Clutch Masters |
| Part number | FW-1921-AL |
| Fits | Clutch Masters 21-22 BMW G80 M3/G82 M4 S58 6-Speed Lightweight Aluminum Flywheel |
| Vehicle fitment | BMW G80 M3/G82 M4 S58 (2021-2022) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. In the G80 and G82, the Competition and xDrive models use the eight-speed automatic. This flywheel is for the six-speed manual rear-drive M3 and M4 only.
Clutch Masters lists it with its Factory Fit FX series twin disc kits for the S58. We stock the FX250, FX350 and FX400 versions, each of which already includes an aluminum flywheel.
Our listing covers 2021-2022. Clutch Masters' current listing extends the same part to 2021-2024 six-speed manual G80 M3 and G82 M4 cars. Send us your VIN to confirm.
A light single-piece aluminum flywheel usually adds some gear rattle at idle compared to the factory part. It is normal and does not mean anything is wrong.
6061 billet aluminum. Clutch Masters machines its aluminum flywheels from billet and hard anodizes them for wear resistance.
