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Twin Plate Holding Power for the S54 Powerplant
The OS Giken TR Series Dampened Twin Plate Clutch gives the BMW E46 M3 a serious step up in torque capacity without sacrificing everyday drivability. Built around the S54 inline six, part number OSGBM237-BF6 uses a billet aluminum cover and dual friction discs to deliver a firmer, more direct pedal feel while handling significantly more power than the factory single plate setup.
Key Features
- OS Giken TR series twin plate design rated up to roughly 500 lb-ft for naturally aspirated builds
- Billet aluminum cover increases clamping force over stamped steel designs
- Dampened center hub smooths engagement and reduces drivetrain shock
- Purpose built for the BMW E46 M3 S54 platform, OSGBM237-BF6 is not a universal fitment kit
- Includes release sleeve assembly and OS flywheel bolts for a complete install
- Ventilated cover design helps manage heat during repeated hard use
Fitment Table
| Year Range | Make | Model |
|---|---|---|
| 2001-2006 | BMW | M3 |
Specifications
| Detail | Value |
|---|---|
| MPN | OSGBM237-BF6 |
| Brand | OS Giken |
| Clutch Type | Twin Plate, Dampened |
| Torque Capacity | Approximately 500 lb-ft (NA applications) |
| Cover Material | Billet Aluminum |
| Flywheel | Included |
| UPC | Not assigned by manufacturer |
What's Included
- OS Giken TR series twin plate clutch assembly
- Matched OS Giken flywheel
- Release sleeve assembly
- OS flywheel bolts
About OS Giken
OS Giken has built clutch and drivetrain systems in Japan since the 1970s, developing technology through direct involvement in professional motorsport. The TR series brings that racing background to enthusiast platforms like the E46 M3, balancing torque capacity with a pedal feel that remains usable outside the track.
FAQ
What is the OSGBM237-BF6?The OSGBM237-BF6 is an OS Giken TR series dampened twin plate clutch designed for the BMW E46 M3 with the S54 engine. It replaces the factory single plate clutch to increase torque capacity while keeping a manageable street pedal feel.
Does this clutch come with a flywheel?Yes, this kit includes a matched OS Giken flywheel along with the twin plate clutch assembly, release sleeve, and flywheel bolts.
What torque rating does the TR series twin plate handle?The TR twin plate design used in the OSGBM237-BF6 is rated for approximately 500 lb-ft of torque in naturally aspirated applications, well above the S54 factory clutch.
Is this clutch suitable for daily driving?Yes, the dampened center hub in the TR series is specifically designed to smooth engagement, making it more streetable than OS Giken's higher capacity R series clutches.
What additional parts are needed for installation?Installation requires the OEM pilot bearing or bushing, which is not included in the kit and should be inspected or replaced during the clutch swap.
Which BMW models does the OSGBM237-BF6 fit?This clutch is designed specifically for the BMW M3 built on the E46 chassis with the S54 engine, covering the 2001 through 2006 model years in the US market.
How does the TR series compare to OS Giken's STR series for the E46 M3?The TR series prioritizes torque capacity and a firmer engagement, while the STR series is tuned for a lighter pedal feel suited to long endurance driving, so the choice depends on whether capacity or pedal effort is the priority.
Is the billet aluminum cover different from a stamped steel clutch cover?Yes, the billet aluminum cover on the OSGBM237-BF6 allows for higher clamping force than a stamped steel cover, which is part of why this clutch supports more torque than entry level twin plate options.
Install Instructions
- Support the vehicle safely and remove the transmission per BMW factory service procedures.
- Remove the factory single plate clutch and flywheel from the S54 crankshaft.
- Inspect the pilot bearing or bushing and replace if worn.
- Install the OS Giken flywheel using the supplied flywheel bolts torqued to specification.
- Mount the TR series twin plate clutch assembly and confirm proper disc alignment.
- Install the release sleeve assembly and reconnect the clutch fork or hydraulic actuator.
- Reinstall the transmission and bleed the hydraulic clutch system.
- Complete a proper break-in cycle before subjecting the clutch to full throttle use.
Prop 65 Warning
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
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