How much power will the STR2C hold?

OS Giken USA rates the STR2C Clutch for R56 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 R56 Cooper S be rebuilt?

Yes. OS Giken USA sells Overhaul Kit A (MN023-BJ5EA) and Overhaul Kit B (MN023-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 R56 Cooper S MINI Turbo, Twin Plate

OS Giken’s STR2C Clutch for R56 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 R56 Cooper S cars is one of several OS Giken clutches listed for the R56 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 R56 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: R56 | 2007-2013 | 1.6L turbo

Notes

OS Giken rebuild parts for this clutch are Overhaul Kit A (MN023-BJ5EA) and Overhaul Kit B (MN023-BJ5EB)
Installation labor is not included

Frequently Asked Questions

How much power will the STR2C hold? OS Giken USA rates the STR2C Clutch for R56 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 R56 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 R56 Cooper S be rebuilt? Yes. OS Giken USA sells Overhaul Kit A (MN023-BJ5EA) and Overhaul Kit B (MN023-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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Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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OS Giken STR2C Clutch for R56 Cooper S MINI Turbo, Twin Plate [MN023-BJ5]

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OS Giken STR2C Clutch for R56 Cooper S MINI Turbo, Twin Plate

Where It Sits in the Range

How It Is Listed

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews