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OS Giken STR Clutch/Flywheel
Uupgrade - R53/R56/55/57 COOPER S
High Quality Performance Clutch and Flywheel Upgrade kit from OS Giken for your
MINI. 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.
Giken products are not for the 'frugal', but for those that seek a performance
solution with priority in quality and durability. The integrated flywheel, clutch,
and pressure plate design maximizes performance in a tightly packaged 'matched'
and 'balanced' solution.
Select Standard Flywheel or Lightened Flywheel from the pull-down menu.
Fits 6-speed Manual Transmission equipped 2002-2006 R53, 2007+ R56 MINI Cooper
S Hatchback, R55 Cooper S Clubman, and R57 Cooper S Convertible.
Kit includes Clutch Disc, Pressure
Plate, Flywheel, Flywheel Bolts and a metal Throwout Bearing.
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
'dual-mass' flywheel uses gel sprung plates to absorb gearbox vibrations. The
Giken unit is a single mass unit which may increase slight 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.
Flywheel and
Clutch Weight: Stock dual mass flywheel and stock
clutch 40lbs. OS Giken flywheel and clutch 23.5lbs
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).
OS Giken has a nice write
up on their frequently asked questions. 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.
Note: Depending on inventory, this product may need to be supplied
from the manufacturer overseas. Delivery 'may' take 4 weeks.
Installation Torque Specifications:
Cover bolts: 13 lb-ft
Housing bolts (attached to back side
of flywheel): 13 lb-ft
Diaphragm spring bolts: DO NOT TIGHTEN
OR LOOSEN
Flywheel bolts: 22 lb-ft plus 90º