Clutch Masters 07-14 Mini Cooper JCW 1.6L Turbo Lightweight Steel Flywheel
If your 2007-2014 Mini Cooper S or John Cooper Works with the 1.6L turbo and manual gearbox rattles at idle, judders when the clutch takes up, or is due for a clutch and you never want to pay for another dual-mass flywheel, Clutch Masters FW-635-SF is the steel single-mass replacement built for that car. It is the street-friendly half of a two-flywheel family; the aluminum FW-635-AL fits the same cars and the same clutch kits.
The factory flywheel on these cars is a dual-mass design: two heavy halves joined by internal springs that soak up engine pulses. When those springs and their bearing wear, the halves rock against each other, which is the rattle many second-generation Mini owners hear at idle or when the engine shuts off. Clutch Masters describes FW-635-SF as a lightweight steel flywheel that replaces the factory dual-mass unit with a one-piece flywheel, so there are no internal springs left to wear out.
Clutch Masters machines its steel flywheels from 1045 steel billet, balances each one, black oxide coats it against rust and certifies it to SFI 1.2 for motorsport use. The maker lists a 24.0 lb shipping weight for FW-635-SF in its box. Steel is the choice for a daily-driven Mini: it holds heat better than aluminum in stop-and-go driving, and Clutch Masters says it usually recommends steel over aluminum for the street because lighter flywheels add gear noise.
One rule matters more than anything else on this page: Clutch Masters calls this a conversion flywheel that only works with a Clutch Masters clutch kit. It will not work with the original Mini clutch or another brand's kit, so plan the flywheel and clutch as one purchase.
Listen at idle with the car in neutral, then press the clutch pedal. If a rattle stops as soon as the pedal goes down, suspect the dual-mass flywheel or release bearing. With the gearbox out, rock the two halves of the flywheel against each other; excessive free play or grease leaking from the springs means it is worn. If the problem is slip rather than noise, our slipping diagnosis guide shows how to read rpm against road speed, and flare versus slip helps if you are not sure what the tach is telling you.
Our listing covers the Mini Cooper S and John Cooper Works with the 1.6L turbo, 2007-2014. Clutch Masters catalogs FW-635-SF for the 1.6L turbo Cooper S from 2007-2015, the 2008-2014 Clubman, the 2011-on Countryman and the 2013-2016 Paceman, all with the manual gearbox. It does not fit the supercharged 2002-2006 Cooper S, the non-turbo Cooper, the 2014-on 2.0L and 1.5L turbo cars or any automatic. Engine and clutch details changed during this run, so send us your year and VIN and we will confirm before you order. See all of our clutch and rebuild parts in the rebuild kits section.
| Brand | Clutch Masters |
| Part number | FW-635-SF |
| Fits | Clutch Masters 07-14 Mini Cooper JCW 1.6L Turbo Lightweight Steel Flywheel |
| Vehicle fitment | Mini Cooper Jcw (2007-2014) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. Clutch Masters says this is a conversion flywheel that only works with a Clutch Masters clutch kit, not the OE clutch or another brand's kit.
The 1.6L turbo manual cars: Cooper S and JCW 2007-2014 per our listing, plus the Clubman, Countryman and Paceman 1.6L turbo that Clutch Masters lists. Send your VIN and we will confirm.
If the rattle comes from a worn dual-mass flywheel, yes, because this one-piece flywheel has no internal springs to wear. A noisy release bearing can sound similar, so check both with the gearbox out.
Steel for a car driven on the street. Clutch Masters recommends steel for street use because aluminum adds gear noise. The aluminum FW-635-AL suits track-focused cars.
Clutch Masters asks for at least 500 miles of normal driving with no full-throttle shifts or hard launches after installing a new clutch and flywheel.
