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Each Kit includes:  Clutch Disc, Pressure Plate, Flywheel and a metal Throwout Bearing.
Mini Cooper Clutch Kit OS Giken STR2C Twin Plate Gen1 R52 R53

Mini Cooper Clutch Kit OS Giken STR2C Twin Plate Gen1 R52 R53

Mini Cooper Clutch Kit OS Giken STR2C Twin Plate Gen1 R52 R53

Mini Cooper Clutch Kit OS Giken STR2C Twin Plate Gen1 R52 R53

Mini Cooper Clutch Kit OS Giken STR2C Twin Plate Gen1 R52 R53
Selected: STR Twin Plate Track Kit
Part No: NMG1632
Specially Priced. Discounts Do Not Apply.
Fits the following:
MINI (2002-Current)
Alternate Products
Clutch Kit Performance Upgrade Gen1 MINI Cooper S R53 2002-2006
Clutch Kit Performance Upgrade Gen1 MINI Cooper S R53 2002-2006
For the MINI with SERIOUS POWER - a race proven OS Giken STR series Twin-Plate Clutch system with the integrated Lightened Flywheel!

The STR series of Twin-Plate clutches are 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 twin plate. Whether it be a SCCA / NASA weekend at the track or a trip to the corner store, the STR twin plate clutch equally handles each task with ease.

Giken products costs slightly more than the factory 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 the following models with the 6-Speed Manual Transmission:

2002-2006 R53 MINI Cooper S Hatchback
2005-2008 R52 MINI Cooper S Convertible

Note: This is a Special 'made-to-order' product from an overseas factory. Delivery may take 4 weeks depending on production & shipment schedule.

This Twin-Plate Clutch Kit is designed for the MINI with up to 550hp - yes, you won't have to worry about overpowering this clutch! It is still an STR type clutch with the single diaphragm spring, so pedal pressure will be about the same as the NMG1630. Of course, clamping force is also about the same. Also, this clutch uses a solid hub, compared to the dampened hub on the NMG1630, so it will not slip as easily. If you have a MINI with LOTS of power, then this set-up is the perfect choice.

In spite of its decreased diameter, this clutch allows for extremely efficient power transfer and improved engine response. The redesigned leverage mechanism of the diaphragm spring on the center cover results in higher pressure of the clutch disk while reducing pedal effort. In addition, ventilation holes are designed to reduce heat generated inside the clutch system and allows for the friction plate dust to exit outside the clutch system, thus increasing reliability and safety. All OS Giken clutches include a corresponding performance flywheel to ensure maximum performance and unlock your vehicle’s potential.

Kit includes Clutch Disc, Pressure Plate, Flywheel, Flywheel Bolts and a metal Throwout Bearing. Enclosed Flywheel Bolts MUST be used with this kit.

For the matching OS Giken Super Lock Limited Slip Differential, take a look at NMG1010.

If you need a rebuild kit for these clutches, see Mini Cooper Clutch Kit Overhaul Kits.

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'.

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).

Read OS Giken's FAQ's.

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, an 'overhaul' kit is available.

Manufacturer's Guarantee

  • All OS Giken goods are guaranteed to be in working order and free of manufacturing defects
  • All OS Giken products are intended for off-road use, no warranty is provided
  • No Returns on purchases over 90 days old
  • No Returns on items that have been installed on a vehicle or items that cannot be resold as new and unused
  • All Returns are subject to a 25% Restocking Fee (Valid Warranty Claims Excluded)
  • All returns are subject to approval by OS Giken USA Inc prior to acceptance



Related Technical Articles:
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Created: September 25, 2015
Performance Clutch Flywheel & LSD from Giken
Created: December 12, 2013
R55 / R56 MCS Clutch Bleeding Instructions
Created: March 29, 2011
The clutch operates using brake fluid. It draws off the brake fluid reservoir via a black tube on the side. Fluid flows from the reservoir into the cylinder above the clutch pedal (when there is a negative pressure). Then when the pedal is pushed the pedal cylinder pushes fluid through the tube into the clutch slave cylinder which activates the clutch.