How much power will the STR2C hold?

OS Giken USA rates the STR2C Clutch for R53 Cooper S at about 575 lb-ft of torque, and OS Giken Japan places the STR range in its 400 PS class. For more power than that, a higher capacity OS Giken series is the better match.

What does STR2C mean?

It is the OS Giken model code. STR is the cover series, 2 is the number of discs and C is the 215mm disc size. There is no D, so the discs have solid hubs for direct engagement. The same code system runs across the whole OS Giken clutch range.

Is the STR2C easy to drive on the street?

OS Giken designed the STR series to hold high capacity with a relatively light pedal, after its endurance racers asked for less pedal effort over long races. The damped hubs absorb drivetrain shock, and OS Giken USA recommends the STR range first for dual-purpose cars.

Can the STR2C Clutch for R53 Cooper S be rebuilt?

Yes. OS Giken USA sells Overhaul Kit A (MN021-BJ5EA) and Overhaul Kit B (MN021-BJ5EB) for this clutch, with Kit B adding a new cover. Our team can order either kit when the clutch needs service, so it can be refreshed rather than replaced, and will confirm the contents for your car.

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Description

OS Giken STR2C Clutch for R53 Cooper S MINI Supercharged, Twin Plate

OS Giken’s STR2C Clutch for R53 Cooper S models is the twin plate clutch from OS Giken’s STR series, built around two 215mm discs with solid hubs and an STR cover built to hold high capacity with a relatively light pedal. OS Giken USA rates it at about 575 lb-ft. OS Giken developed the STR series after its endurance racers asked for a lighter pedal, and OS Giken USA recommends it first for motorsport and dual-purpose cars.

Where It Sits in the Range

The STR2C Clutch for R53 Cooper S cars is one of several OS Giken clutches listed for the R53 MINI Cooper S. The STR1CD (about 300 lb-ft), GT1CD and GTS1CD cover other points in the range, so the choice comes down to power, pedal feel and how the car is used.

How It Is Listed

OS Giken USA and Turn 14 list the STR2C for the R53 Cooper S. The OS Giken Japan table does not show the STR2C for this car, so our team will confirm fitment and release parts before the order is placed.

Features

Two 215mm discs with solid hubs
STR cover built for a relatively light pedal
Rated by OS Giken USA at about 575 lb-ft
Rebuildable with OS Giken overhaul kits

Applications

MINI Cooper S: R53 | 2002-2006 | 1.6L supercharged
MINI Cooper S Convertible: R52 | 2005-2008 | 1.6L supercharged

Notes

OS Giken rebuild parts for this clutch are Overhaul Kit A (MN021-BJ5EA) and Overhaul Kit B (MN021-BJ5EB)
Installation labor is not included

Frequently Asked Questions

How much power will the STR2C hold? OS Giken USA rates the STR2C Clutch for R53 Cooper S at about 575 lb-ft of torque, and OS Giken Japan places the STR range in its 400 PS class. For more power than that, a higher capacity OS Giken series is the better match.
Who is the STR2C made for? OS Giken developed the STR series after its endurance racers asked for a lighter pedal, and OS Giken USA recommends it first for motorsport and dual-purpose cars. On the R53 MINI Cooper S it suits owners who want high capacity with a relatively light pedal for long sessions.
What does STR2C mean? It is the OS Giken model code. STR is the cover series, 2 is the number of discs and C is the 215mm disc size. There is no D, so the discs have solid hubs for direct engagement. The same code system runs across the whole OS Giken clutch range.
Is the STR2C easy to drive on the street? OS Giken designed the STR series to hold high capacity with a relatively light pedal, after its endurance racers asked for less pedal effort over long races. The damped hubs absorb drivetrain shock, and OS Giken USA recommends the STR range first for dual-purpose cars.
Can the STR2C Clutch for R53 Cooper S be rebuilt? Yes. OS Giken USA sells Overhaul Kit A (MN021-BJ5EA) and Overhaul Kit B (MN021-BJ5EB) for this clutch, with Kit B adding a new cover. Our team can order either kit when the clutch needs service, so it can be refreshed rather than replaced, and will confirm the contents for your car.

About OS Giken

OS Giken was founded in Okayama, Japan in 1973 by Masaharu Okazaki. It built the TC16 and TC24-B1 DOHC cylinder heads for Nissan L-series engines, began making multi-plate racing clutches in 1982 and started supplying OEM limited-slip differentials in 1983. Development of the Super Lock LSD began in 1997, and of the OS-88 sequential gearbox for the Skyline GT-R in 1998.

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BP Pricing Difference

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OS Giken STR2C Clutch for R53 Cooper S MINI Supercharged, Twin Plate [MN021-BJ5]

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OS Giken STR2C Clutch for R53 Cooper S MINI Supercharged, Twin Plate

Where It Sits in the Range

How It Is Listed

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews