BMW Drivetrain Parts

Bav Auto Differential, Transfer Case, Transmission Oil-Pan Wrench ...

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T#:580353

Part#: B8800025

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$ 24.74 USD

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The proper size for removing BMW drain plugs.

Differential Fluid Extraction Adapter

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T#:578659

Part#: B3300000

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$ 21.33 USD

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Differential Fluid Extraction Adapter is an essential tool for efficiently draining and refilling differential fluid, ensuring your vehicle's differential system remains in optimal condition. Designed to work with most extraction pumps, this adapter simplifies maintenance tasks, making it easier to service your differential without the mess or hassle of traditional methods.

Efficient fluid extraction: Allows for quick and clean draining of differential fluid.
Versatile compatibility: Works with most extraction pumps, offering flexibility for various vehicle makes and models.
Hassle-free maintenance: Simplifies the process of refilling and draining differential fluid, reducing time and effort.
Durable construction: Built from high-quality materials to withstand frequent use and harsh conditions.
Easy installation: Designed for a secure fit and easy attachment to extraction pumps.

This Differential Fluid Extraction Adapter is a must-have for any vehicle owner looking to maintain the longevity and performance of their differential system.

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Bav Auto CV Axle Shaft Puller / Wheel Bearing Hub Installer Kit ...

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T#:580411

Part#: B8800102

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$ 104.39 USD

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Thin sockets included in this Bav Auto puller kit thread on to the axle shaft and pull the splined axle shaft into the hub. Can also be used to press wheel bearings onto the spindle shaft.

Bav Auto Transmission/Differential Drain Plug Socket Set

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T#:580446

Part#: B8800141

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$ 27.74 USD

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Drain plug socket set. Set of 3 hex-head sockets make removal of transmission and differential drain plugs so much easier. Includes 10mm, 14mm and 17mm sizes. 3/8" drive

Clutch Slave Cylinder Bleeder Tool

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T#:585675

Part#: CBTTOOL

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$ 70.42 USD

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Bleed your slave cylinder with confidence using this clutch slave cylinder bleeder tool. Get the job done right the first time and assure that your clutch pressure is appropriate. Use the tools' adjustable piston rod to apply pressure to the cylinders' piston rod, making the process much simpler.

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Bav Auto Fluid Transfer Pump - 200ml - Viton Seals

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T#:580336

Part#: B8800004

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$ 29.24 USD

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Use this high-quality fluid transfer pump to remove old fluid from power steering reservoirs, brake fluid reservoirs or differentials that do not have drain plugs (as on many later model BMWs), or to fill transmissions, differentials, and any other assemblies when changing the fluids.

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Bav Auto Wheel Hub and Rotor Grinding Kit

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T#:580437

Part#: B8800132

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$ 43.19 USD

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Used to remove corrosion and ensure brake rotors, wheel spacers, etc sit flush on your hubs

Bav Auto Axle Shaft Impact Force Screw Adapter

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T#:580429

Part#: B8800122

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$ 36.89 USD

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For use with B8800120 (Hub Puller Adapter) as an impact driver to aid in removal of stuck CV axle shafts.

Bav Auto Fluid Transfer Pump - 1 Liter - Viton Seals

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T#:580335

Part#: B8800003

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$ 51.84 USD

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Use this high-quality fluid transfer pump to remove old fluid from power steering reservoirs, brake fluid reservoirs or differentials that do not have drain plugs (as on many later model BMWs), or to fill transmissions, differentials, and any other assemblies when changing the fluids. For draining differentials we recommend using the Bavarian Autosport adapter part # B3300000.

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Bav Auto Hub Adapter / Hub Puller

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T#:580427

Part#: B8800120

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$ 98.99 USD

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For use with B8800122 impact driver to remove stuck CV axle shafts.

Bav Auto Wheel Hub Puller / Axle Press - 4 lug bolt - BMW & MINI ...

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T#:580367

Part#: B8800043

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$ 32.29 USD

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Use this tool to press the splined axle end out of the wheel flange or hub on rear-wheel drive and front-wheel drive 4 LUG BMWs and MINIs. This tool is also used to pull the front wheel bearing hub on 2-wheel drive BMW models with sealed bearing and hub assemblies.

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Bav Auto Oil Extractor - 10 Liter - Inserts Into Dip Stick Tube ...

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T#:580333

Part#: B8800001

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$ 146.19 USD

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Change your oil without getting underneath the vehicle! This oil extractor pulls the oil out of your engine through the dip stick tube.

Bav Auto Wheel Bearing Tool Master Set

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T#:580402

Part#: B8800092

Ships on Aug 10, 2026

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$ 338.19 USD

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For removal and installation of pressed in rear wheel bearings on most BMW's and pressed in front wheel bearing on many all-wheel drive BMWs.

Bav Auto Rear Subframe Bushing Press - E88 E9X BMW

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T#:580432

Part#: B8800127

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$ 407.39 USD

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The Bav Auto Rear Subframe Bushing Press allows you to remove and install rear subframe bushings while the subframe is still in the vehicle, saving you several hours of labor.

Bav Auto 36MM 12 Point Socket - 1/2" Drive

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T#:580421

Part#: B8800114

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$ 22.49 USD

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This is a thin-walled 1/2" drive 36mm impact socket - useful in removing or installing wheel bearing and axle nuts on several BMW models.

MINI R53/R56 OS Giken Super Lock Racing Limited Slip Differential ...

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T#:200230

Part#: MN024-HA

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$ 1,650.00 USD

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If your MINI is only for competition use - autocross, time trial, or racing - this OS Giken LSD may be a better option than the standard 1.5-way unit. This race-spec LSD was developed over several seasons of competitive autocross. It uses a new high pressure ring for quicker response time and faster lockup. This makes it ideal for quick transitions and rapid on/off throttle motions typically encountered on the track. It's a one-way lockup so the car stays predictable under braking and gives the driver more feedback. For street use we prefer the normal 1.5-way setup because it's more progressive during lockup.

The biggest shortcoming of any MINI is not the lack of power - it's being able to put all of its useable power to the ground! The Cooper S is basically a one-wheel drive car and sending 200+ hp through that one tire does not live up to its full potential. A limited-slip differential is essential to any highly-tuned FWD car. The OS Giken Super-Lock is one of the most advanced clutch-type differentials on the market, and a favorite of autocrossers and road racers. The OS LSD for the MINI features ten clutch discs for a smooth and progressive lockup. By putting all of your available power to the ground you're at an instant advantage over the stock open-type differential. You'll be able to power through corners and on rough surfaces instead of uselessly spinning a wheel. Understeer is reduced by giving more bite to the tire that has the most traction. With an LSD in your MINI Cooper S you'll wonder why it wasn't first on your list to begin with (or why MINI/BMW left it out in the first place...).

The MNI OS Giken LSD uses a special 80W250 fluid that must be purchased separately.

This item fits the following BMWs:
2002-2006 R53 MINI MINI Cooper S (6MT manual transmission only)
2007-2013 R56 MINI MINI Cooper S (6MT manual transmission only)

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Bav Auto Drive Shaft and Differential Nut Remover / Installer ...

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T#:580440

Part#: B8800135

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$ 263.83 USD

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Tool used to install / remove the screw nut between your BMW's rear drive axle and the differential - can also be used in replacing your differential input seal.

Bav Auto Rear Subframe Bushing Press Tool

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T#:580407

Part#: B8800097

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$ 372.47 USD

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Allows you to both remove and install rear subframe to body bushings without removing your subframe, saving you hours of labor from having to disassemble suspension components.

OS Giken E9X M3 Clutch Overhaul Kit (for Grand Am Legal Racing Flywhe...

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T#:2209

Part#: BM533-BF6EA

Ships in 2 Business Days

$ 999.99 USD

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This kit includes parts needed to overhaul the OS Giken E90/E92 M3 Grand Am legal clutch kit, including clutch discs (2), center plates, and cover bolts (all). As used in the Grand Am KONI Challenge GS class V8 M3s, including both Turner Motorsport E92 M3 race cars.

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Differential And LSD Tune

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T#:34382136

Part#: BM237HAKT

Ships in 2 Business Days

$ 2,100.00 USD

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Upgrade to a better performing LSD, includes tune.

E46 M3, E9X M3, E34 M5, E39 M5, Z4 M OS Giken Super Lock Limited Slip...

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T#:1387

Part#: BM237-HA

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$ 1,950.00 USD

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$ 1,950.00 USD

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The M Dynamic limited slip unit on the M3 is designed to be a pure street car differential. It's simply not up to the rigors of professional or amateur racing. The OS Giken Super Lock LSD is giant step up in from a stock M3 lsd unit. It's ready for the extreme conditions of racing, offers 100% progressive locking capability, and is able to do this while operating smoothly and quietly. It's use of advanced technologies that make it perfect for both street cars AND pro race cars... and everything in between. We're excited to be carrying the OS Giken LSD unit in our performance catalog, as we've been using them in our own Championship winning M3 race cars.

OS Giken incorporated revolutionary new ideas when developing the their own limited slip diff, utilizing their accumulated racing knowledge and experience and over 4 years of development. Their design uses an unprecedented number of friction plates (up to 28 total!) for better locking force, better engagement/disengagement, and less generated heat. The end result of their efforts is the OS Giken's OS Super Lock LSD which offers incredible durability and reliability on street and track driven BMWs. The use of highest quality materials, precise machining, forged gears and sound engineering makes this LSD durable and reliable enough for road racing performance (which we can personally vouch for!). This is such a great design, in that it can be used in any situation -- whether it's for a street car, or a 100% Professional race car. Zero break-in required. Super smooth and quiet engagement, and 100% progressive locking capability. Professional installation is recommended.

This Limited Slip Differential Unit fits the following BMWs:
2001-2006 E46 M3 coupe & convertible
2008-2013 E9X M3 coupe & convertible
1991-1995 E34 M5 sedan
1999-2003 E39 M5 sedan
2006-2008 E85 Z4M Z4 M Coupe, Z4 M Roadster

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OS Giken E9X M3 Clutch Alignment and Installation Tool

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T#:2193

Part#: BM533-EB

Ships in 2 Business Days

$ 90.00 USD

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This rugged tool simulates the input shaft of the 2008-2013 E9X M3 transmission, for easy installation of the OS Giken racing clutch kit. This tool is simply a must if you will be installing a clutch into the newer V8 model M3. This is a OS Giken part but can be used for other E9X M3 clutch kits where a more durable metal tool is called for.

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E9X M3 OS Giken High Performance Racing Clutch & Flywheel Kit ...

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T#:338592

Part#: BM533-BF6

Ships in 2 Business Days

Starting at $ 2,150.00 USD

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Starting at $ 2,150.00 USD

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This racing flywheel and clutch kit is made by renowned drivetrain specialist OS Giken. Complete fly wheel & clutch setup as used on our own TMS E92 M3 race cars. This setup is ideal for both endurance racing or high horsepower applications that have very limited street use but require more clamping power than stock. It has been approved for use in the GRAND AM Continential Challenge GS race class, approved by GRAND AM rules and regulations.

Includes flywheel, clutch discs (2 disc clutch), center plate, pressure plate, aluminum cover, 360 degree housing (for clutch assembly), cover bolts, flywheel bolts, throw-out bearing, and release sleave assembly. Weighs 5% less than the stock E90/E92 M3 flywheel and clutch setup. This setup is intended for racing use only (not for daily driven street cars.) We recommend using the OS Giken clutch alignment tool during installation (sold separately).

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MINI R Chassis OS Giken Clutch Kit - STR Series

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T#:30164597

Part#: MN023-BJ5

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$ 1,920.00 USD

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MINI R Chassis OS Giken Clutch Kit - STR Series enhances performance and durability for your BMW or MINI. This high-performance clutch kit from OS Giken is designed specifically for MINI R chassis models, offering improved torque capacity and durability. With its STR series design, it ensures smooth engagement and precise control, perfect for both street and track applications. Engineered with high-quality materials, this clutch kit provides reliable performance under demanding conditions.

Enhances performance and durability
Designed specifically for MINI R chassis models
Improved torque capacity for enhanced power transfer
STR series design ensures smooth engagement
Suitable for both street and track use

Upgrade your BMW or MINI R chassis with the MINI R Chassis OS Giken Clutch Kit - STR Series for superior clutch performance and reliability.

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Bav Auto Hub Puller Slide Hammer Adapter

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T#:580428

Part#: B8800121

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$ 17.99 USD

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Necessary in order to use Bav Auto's Hub Adapter/Puller (B8800120) . 5/8" x 18T UNF thread.

Bav Auto Transmission 17mm Drain Plug Wrench - Manual Transmission ...

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T#:580447

Part#: B8800142

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$ 14.99 USD

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Makes changing your transmission fluid an easy task. 1/2 " drive, for use in BMWs with 17mm female allen transmission drain plugs.

OS Giken Throw Out Bearing Only For OS Giken Clutch Kit

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T#:54388400

Part#: MN023-AJ60K

Ships in 5 Business Days

$ 150.00 USD

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Throw out bearing for OS Giken clutches

OS Giken Clutch Kit - Grand Touring Series - Mini R5X

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T#:23383349

Part#: MN023-AQ6

Ships in 2 Business Days

$ 1,680.00 USD

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Introducing the Mini Grand Touring Clutch, a revolutionary addition to the clutch lineup. This clutch incorporates cutting-edge technology from our Racing Multi-plate Clutches, enhanced further by our exclusive "floating pressure system." Say goodbye to rough and noisy drives - experience a seamless and chatter-free driving sensation. The Mini Grand Touring Clutch is offered in both single and twin plate configurations, with options for soft or hard clutch covers to cater to various engine outputs. Achieve a maximum torque of 315 FT/LBS with this innovative clutch.

Incorporates advanced "floating pressure system" for a smooth driving experience
Retains technology from Racing Multi-plate Clutches
Available in single and twin plate configurations
Options for soft or hard clutch covers to suit engine output

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OS Giken Clutch Kit - STR Series - R52, R53

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T#:54388380

Part#: MN021-BJ5

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$ 1,920.00 USD

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Upgrade your drivetrain and experience the perfect balance of track performance and street drivability.

OS Giken TractionControl Limited Slip Differential Unit - E82 135i, E...

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T#:338591

Part#: BM531-HC

Ships in 2 Business Days

Starting at $ 2,550.00 USD

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Starting at $ 2,550.00 USD

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video: E92 335i with limited slip

click for high quality

A turbocharged BMW such as the 135i or 335i needs traction to put that power to the ground. The stock differential of both the 135i and 335i only put power to one wheel -- this just won't cut it! Upgrading to a limited slip differential means power to BOTH wheels, for better launch, acceleration, grip, and track handling. We're excited to be carrying the OS Giken LSD unit in our performance catalog, as we've used their products on our own Championship winning E46 and E92 race cars.

OS Giken's newest innovation is their quietest and smoothest limited slip unit yet - the Traction Control Differential (TCD). TCD is similar to their excellent Superlock differentials but with additional oil channels and pathways. The added lubrication makes diff operation smoother and quieter than before (not that there were many complaints to begin with). The locking engagement is more progressive than before which makes this diff more suitable for street driving. Track cars and drift cars should still use the Superlock LSD as it will transition to lock sooner. TCD is an evolution of a diff that was already extremely well-engineered for road and track use. Not willing to rest on their laurels, they took their superior engineering a step further.

With the 135i/335i LSD unit, they have incorporated revolutionary ideas into the overall limited-slip design which uses an unprecedented number of friction plates (up to 28 total!) for better locking force, better engagement/disengagement, and less generated heat. The use of highest quality materials, precise machining, forged gears, and sound engineering makes this LSD durable and reliable enough for road racing performance (which we can personally vouch for!). Zero break-in required. 100% progressive locking capability.

Installation note: BMW differentials use many unique and BMW-only parts and components. Only technicians who are experienced and familiar with BMW parts should perform the installation. The OS Giken LSD is the limited slip unit (or 'chunk') only. It replaces the stock non-LSD chunk but the original ring and pinion and other internals must be installed with the OS Giken unit. This unit will only work on 335i manual differentials with a bolt-in or modified ring gear. Proper setup and spacing is critical for long life operation. Incorrect installation will void the warranty. We also offer the TCD unit pre-installed - see our performance diff catalog for more info.

The OS Giken TCD Diff unit fits the following BMWs:
2008-2012 E82 BMW 135i with manual transmission
2007-2011 E90 BMW 335i - Sedan with manual transmission
2007-2013 E92 BMW 335i 335is - Coupe with manual transmission
2007-2013 E93 BMW 335i - Convertible with manual transmission

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LSD Tune For OS Giken Differential

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T#:34382134

Part#: LSD-TUNE

Ships in 2 Business Days

$ 150.00 USD

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$ 150.00 USD

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OS Giken Superlock Limited Slip Differential Unit - E82 135i, E9X 335...

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T#:338590

Part#: BM531-HA

Ships in 2 Business Days

Starting at $ 3,700.00 USD

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Starting at $ 3,700.00 USD

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video: E92 335i with limited slip

click for high quality

A turbocharged BMW such as the 135i or 335i needs traction to put that power to the ground. The stock differential of both the 135i and 335i only put power to one wheel -- this just won't cut it! Upgrading to a limited slip differential means power to BOTH wheels, for better lauch, acceleration, and track handling. We're excited to be carrying the OS Giken LSD unit in our performance catalog, as we've used their products on our own Championship winning E46 and E92 race cars.

With the 135i/335i LSD unit, they have incorporated revolutionary new ideas into the design (4 years in the making!) which uses an unprecedented number of friction plates (up to 28 total!) for better locking force, better engagement/disengagement, and less generated heat. The end result of their efforts is the OS Giken's OS Super Lock LSD which offers incredible durability and reliability on street and track driven BMWs. The use of highest quality materials, precise machining, forged gears and sound engineering makes this LSD durable and reliable enough for road racing performance (which we can personally vouch for!). Zero break-in required. Super smooth and quiet engagement, and 100% progressive locking capability.

Installation note: BMW differentials use many unique and BMW-only parts and components. Only technicians who are experienced and familiar with BMW parts should perform the installation. The OS Giken LSD is the limited slip unit (or 'chunk') only. It replaces the stock non-LSD chunk but the original ring and pinion and other internals must be installed with the OS Giken unit. This unit will only work on 335i manual differentials with a bolt-in or modified ring gear. Proper setup and spacing is critical for long life operation. Incorrect installation will void the warranty. We also offer the TCD unit pre-installed - see our performance diff catalog for more info.

The OS Giken Superlock Diff unit fits the following BMWs:
2008-2012 E82 BMW 135i with manual transmission
2007-2011 E90 BMW 335i - Sedan with manual transmission
2007-2013 E92 BMW 335i 335is - Coupe with manual transmission
2007-2013 E93 BMW 335i - Convertible with manual transmission

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OS Giken Clutch Kit - STR Series - R55 to R61

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T#:22756718

Part#: MN023-AJ6

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$ 1,490.00 USD

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Upgrade Your Clutch for Spirited Driving with STR Clutch

Elevate your driving experience with the STR Clutch, perfect for those who enjoy spirited driving and require a balance between street and occasional race performance. While it may differ from a Factory Dual Mass Clutch, the STR Clutch comes in single and twin plate configurations, paired with a unique clutch cover to maintain a factory clutch pedal feel. This ensures a race-ready clutch that's also easy to handle in everyday driving situations.

Key Features:

Available in single and twin plate configurations
Unique clutch cover for a factory-like pedal feel
Suitable for spirited driving and occasional racing
Dampened Single Plate with Soft Diaphragm
Release Assembly included
Maximum capacity: 285 FT/LBS TORQUE

Upgrade your clutch and enjoy the performance and versatility of the STR Clutch.

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Upgrade Your Clutch for Spirited Driving with STR Clutch

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