High Quality Performance Clutch and Flywheel Upgrade kits from OS Giken. Different kits are available depending on your application.
Giken products costs slightly more than the factory dual mass flywheel and clutch replacements, but offers higher quality and durability. The integrated flywheel, clutch, and pressure plate design provides a 'matched' and 'balanced' solution.
Fits a 6-speed manual transmission on the following Cooper S models:
2007-2013 R56 MINI Cooper S Hardtop
2008-2014 R55 MINI Cooper S Clubman
2009-2015 R57 MINI Cooper S Convertible
2012-2015 R58 MINI Cooper S Coupe
2012-2015 R59 MINI Cooper S Roadster
Also fits JCW models.
Each Kit includes
STR Clutch Kit: Best suited for those who enjoy spirited driving and is well suited for street and occasional race use. The STR Clutch is available in single and twin plate configurations, and matched with a unique clutch cover which provides a factory clutch pedal feel. The result is a race ready clutch that can be easily driven around town.
A performance street / occasional track set-up good for MINIs with up to 300-350 whp, yet delivers with 'stock-like' pedal pressure perfect for daily driving. Works great on the track for 250 whp MINIs.
Unfortunately, the STR Twin Plate Clutch Kit has been discontinued.
Grand Touring Clutch Kit: the latest development to our clutch lineup and retains all the technology from our Racing Multi-plate Clutches, but with the addition of our unique “floating pressure system” to provide a smooth and chatter-free driving experience.
The Grand Touring clutch kits are designed for daily driven high performance vehicles. GT clutches provide the comfort of the stock clutch’s pedal feel with improved durability.
Use new OEM Flywheel Bolts (not included) - since the Giken Flywheel is 3mm THINNER than the stock flywheel, bolt length MUST BE CONFIRMED before assembly. It may be necessary to reduce bolt length by 3mm in order to prevent obstruction.
See G2NMG7603 for OEM Flywheel Bolts.
For the 2002-2006 R53 Cooper S Hatchback and 2005-2008 R52 Cooper S Convertibles, see NMG1630.
For the matching OS Giken Super Lock Limited Slip Differential, take a look at G2NMG1100.
THE OS GIKEN SOLUTION
The STR series single plate clutches were designed for daily driven high performance vehicles. STR clutches provide the comfort of the stock clutch’s pedal feel and the strength of a race ready setup. Whether it be a lap around the track or a trip to the corner store, the STR clutch equally handles each task with ease.
NOTE: The stock 'twin-mass' flywheel uses sprung plates to absorb gearbox vibrations. The Giken unit is a single mass unit which may increase gearbox 'noise'.
THE OS GIKEN ADVANTAGE
OS Giken Clutches: Through our research and development of high performance engines, we realized the need for the production of higher quality, more durable clutch systems to meet the rigorous demands of race and sport driving. Our OS clutch is able to transmit engine revolutions and output to the drive train without loss. They are made of the highest quality materials and their durability is second to none. Our continual research and development has brought about many improvements and we are confident that our clutches can meet the demands of even the most heavily modified vehicles.
What is the difference between an OS Giken clutch and another companies clutch?
Through years of development and since its first introduction to the public in 1983, OS Giken clutches have always focused on extraordinary durability, drivability, and effective power transmission. In order to properly develop a clutch system to maximize drivetrain performance, OS Giken determined that it would be most effective to engineer and manufacture clutch kits as a clutch/flywheel package. By doing so, a clutch kit can be installed which has already been properly matched to your MINI. Additionally, the design, engineering and manufacturing of OS Giken clutch kits promote improved durability (through friction plate material which is carefully selected and alloyed so that the plates match with the materials of the flywheel and center plate), maintained drivability (through revised leverage mechanisms to provide higher disk pressure while reducing pedal effort), increased longevity (through a superior design and usage of extra manufacturing processes for strengthening).
In 1975, OS Giken made it's memorable entry into the racing world with the its unparalleled Four Valve DOHC TC16-MAII/TC24-B1 engine and firmly established itself as one Japan's most innovative race engineering companies.
Because all of OS Giken's designs and concepts are based on sound engineering and quality manufacturing, their reputation for reliable performance and durability is unparalleled.
Consequently, OS Giken’s drive train products are commonly the first choice for professional race teams in Japan, because in order to finish first you must first finish the race.
When the time comes, 'overhaul' kits are available.
Note: Depending on inventory, this product may need to be supplied from the manufacturer overseas. Delivery 'may' take 1-2 weeks or sometimes over 4 weeks.