What does the STR1CD Overhaul Kit B for R56 Cooper S replace?

The STR1CD Overhaul Kit B for R56 Cooper S replaces the wear parts of the STR1CD clutch and includes a new cover. Our team will confirm the exact contents with OS Giken before the order is placed, so you know what arrives in the box.

Should I choose Overhaul Kit A or Overhaul Kit B?

Choose Kit A when the existing cover is in good condition, with no heat damage and a healthy diaphragm, because it costs less and reuses a part that still works. Choose Kit B when the cover shows wear or heat marks, or when the clutch has seen enough use that a full refresh makes sense.

Will this kit rebuild a different OS Giken clutch?

No. This kit is matched to the STR1CD clutch, part number MN023-AJ6, for the R56 MINI Cooper S. Other OS Giken clutches use different covers, discs and plates, and each has its own overhaul kit, so the kit should always match the clutch part number.

How do I know my clutch needs rebuilding?

The usual signs are slip under full load, an engagement point that has moved, or new judder on take-off. Wear depends heavily on launches, track use and power level, so there is no fixed interval. When any of those signs appear, a rebuild with fresh parts restores the original behavior.

Is a rebuild better than a new clutch?

For an OS Giken clutch that has not been overheated, a rebuild restores the original behavior for less than a new clutch, because the parts that last are kept. If the clutch has been badly overheated, our team can advise whether the STR1CD Overhaul Kit B for R56 Cooper S or a full replacement is the better route.

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Description

OS Giken STR1CD Overhaul Kit B for R56 Cooper S MINI Turbo

OS Giken’s STR1CD Overhaul Kit B for R56 Cooper S clutches is the OS Giken rebuild kit for the STR1CD single plate clutch in the R56 MINI Cooper S. Kit B is the fuller rebuild, adding a new cover so nothing from the old clamping stack goes back into the car. OS Giken builds its clutches to be serviced rather than thrown away, and a timely rebuild protects the flywheel and cover from heat damage. 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.

Keeping the Clutch Healthy

The STR1CD Overhaul Kit B for R56 Cooper S clutches is matched to the STR1CD clutch (MN023-AJ6). OS Giken also sells Overhaul Kit A (MN023-AJ6EA), which reuses a healthy cover for less.

Features

Rebuilds the STR1CD clutch (MN023-AJ6)
Includes a new cover for a complete refresh
Matched to the original OS Giken specification
Lets an OS Giken clutch be serviced rather than replaced

Applications

MINI Cooper S: R56 | 2007-2013 | 1.6L turbo

Notes

This STR1CD Overhaul Kit B for R56 Cooper S kit rebuilds the OS Giken STR1CD Clutch for R56 Cooper S (MN023-AJ6) and does not fit other OS Giken clutches
Includes a new cover
OS Giken Japan notes that overhaul parts for European applications differ from its domestic kits; our team will confirm the exact contents before the order is placed
Installation labor is not included

Frequently Asked Questions

What does the STR1CD Overhaul Kit B for R56 Cooper S replace? The STR1CD Overhaul Kit B for R56 Cooper S replaces the wear parts of the STR1CD clutch and includes a new cover. Our team will confirm the exact contents with OS Giken before the order is placed, so you know what arrives in the box.
Should I choose Overhaul Kit A or Overhaul Kit B? Choose Kit A when the existing cover is in good condition, with no heat damage and a healthy diaphragm, because it costs less and reuses a part that still works. Choose Kit B when the cover shows wear or heat marks, or when the clutch has seen enough use that a full refresh makes sense.
Will this kit rebuild a different OS Giken clutch? No. This kit is matched to the STR1CD clutch, part number MN023-AJ6, for the R56 MINI Cooper S. Other OS Giken clutches use different covers, discs and plates, and each has its own overhaul kit, so the kit should always match the clutch part number.
How do I know my clutch needs rebuilding? The usual signs are slip under full load, an engagement point that has moved, or new judder on take-off. Wear depends heavily on launches, track use and power level, so there is no fixed interval. When any of those signs appear, a rebuild with fresh parts restores the original behavior.
Is a rebuild better than a new clutch? For an OS Giken clutch that has not been overheated, a rebuild restores the original behavior for less than a new clutch, because the parts that last are kept. If the clutch has been badly overheated, our team can advise whether the STR1CD Overhaul Kit B for R56 Cooper S or a full replacement is the better route.

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.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

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 STR1CD Overhaul Kit B for R56 Cooper S MINI Turbo [MN023-AJ6EB]

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OS Giken STR1CD Overhaul Kit B for R56 Cooper S MINI Turbo

Keeping the Clutch Healthy

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews