How much power will the TR2B hold?

OS Giken USA rates the TR2B Clutch for E46 M3 at about 500 lb-ft of torque, and OS Giken Japan places the TR range in its 600 PS class. For more power than that, a higher capacity OS Giken series is the better match.

It is the OS Giken model code. TR is the cover series, 2 is the number of discs and B is the 204mm 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 TR2B easy to drive on the street?

The billet aluminum cover gives a more direct pedal, and OS Giken shaped the diaphragm spring to reduce overall pedal effort. Expect firmer engagement than a factory clutch, but it remains usable on the street. The aluminum cover also allows a higher clamping force for track use.

Can the TR2B Clutch for E46 M3 be rebuilt?

Yes. OS Giken USA sells Overhaul Kit A (BM237-BF3EA) and Overhaul Kit B (BM237-BF3EB) 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 TR2B Clutch for E46 M3 BMW S54, Twin Plate

OS Giken’s TR2B Clutch for E46 M3 models is the twin plate clutch from OS Giken’s TR series, built around two 204mm discs with solid hubs and a billet aluminum cover for a more direct pedal and a higher clamping force. OS Giken USA rates it at about 500 lb-ft, and OS Giken designed the TR2B with common tuner engines in mind. OS Giken USA describes the TR series as built for engines with substantial increases in power, with a diaphragm spring shaped to reduce overall pedal effort.

Where It Sits in the Range

The TR2B Clutch for E46 M3 cars is one of several OS Giken clutches listed for the E46 M3. The R3C (about 1,100 lb-ft), R3CS (about 990 lb-ft) and TR2CD (about 750 lb-ft) cover other points in the range, so the choice comes down to power, pedal feel and how the car is used.

How OS Giken Japan Lists It

OS Giken Japan lists the TR2B for the E46 M3 S54 with an OS Giken sleeve bearing required, sold separately, and new flywheel bolts (eight) required. Our team will confirm the parts before the order is placed.

Features

Two 204mm discs with solid hubs
Billet aluminum TR cover for a higher clamping force
Rated by OS Giken USA at about 500 lb-ft
Designed with common tuner engines in mind
Rebuildable with OS Giken overhaul kits

Applications

BMW M3: E46 | 2001-2006 | 3.2L S54

Notes

OS Giken rebuild parts for this clutch are Overhaul Kit A (BM237-BF3EA) and Overhaul Kit B (BM237-BF3EB)
Installation labor is not included

Frequently Asked Questions

How much power will the TR2B hold? OS Giken USA rates the TR2B Clutch for E46 M3 at about 500 lb-ft of torque, and OS Giken Japan places the TR range in its 600 PS class. For more power than that, a higher capacity OS Giken series is the better match.
Who is the TR2B made for? OS Giken designed the TR2B with common tuner engines in mind. OS Giken USA describes the TR series as built for engines with substantial increases in power, with a diaphragm spring shaped to reduce overall pedal effort. On the E46 M3 it suits owners who want more clamping force for a heavily modified engine.
What does TR2B mean? It is the OS Giken model code. TR is the cover series, 2 is the number of discs and B is the 204mm 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 TR2B easy to drive on the street? The billet aluminum cover gives a more direct pedal, and OS Giken shaped the diaphragm spring to reduce overall pedal effort. Expect firmer engagement than a factory clutch, but it remains usable on the street. The aluminum cover also allows a higher clamping force for track use.
Can the TR2B Clutch for E46 M3 be rebuilt? Yes. OS Giken USA sells Overhaul Kit A (BM237-BF3EA) and Overhaul Kit B (BM237-BF3EB) 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.

Additional Information

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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 TR2B Clutch for E46 M3 BMW S54, Twin Plate [BM237-BF3]

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OS Giken TR2B Clutch for E46 M3 BMW S54, Twin Plate

Where It Sits in the Range

How OS Giken Japan Lists It

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews