Whether you are looking for a custom built limited slip differential, a finned differential cover for you E36 M3, or just need differential mounts or seals, we have the BMW differential parts you need.
Available for the following BMWs: (click icon to change BMW)
Custom Differential for E46/E39/Z4 6 cylinder (non-M)
(more info) We offer a wide variety of differential options for the E46 3 series 6 cylinder (except M3), E39 6 cylinder, and Z4 (non-M). From a simple rebuild of your current differential, to high end variable ramp limited slip options for the serious racer.
How does this work? It's easy. We will build your custom differential, which will be shipped directly to you. As an option, we can also rebuild your current diff, keeping the same ratio, but allowing you to upgrade to limited slip (or change your current limited slip unit). All new/rebuilt differential includes an $800 core charge. You can then send us your old/stock differential as a core -- Factory open diffs (non limited slip) are elligible for the full $800 credit. All custom diffs receive the same $800 core charge. Cores must be sent to us within 15 days or receiving your rebuilt core. Sorry, no returns on custom built differentials.
Customizing your rebuilt differential has never been easier. Simply select your options below. The base price includes a rebuilt open differential with your current gearing and gear set (no change in ratio). If you would like a custom ratio change, and/or a limited slip differential (LSD) unit added, simply choose your options below.
Select your options below to customize your E46/E39/Z4 (6 cyl non-M) diff.
Part #: E46-DIFFERENTIAL
Price: $1,195.00 (USD)
OS Giken Limited Slip Differential Fluid - 80w-250 - 1 liter
(more info) The OS Giken Super Lock LSD Gear Oil 80W-250 1 Liter FR is the OS Giken's very own special blend of gear oil which does an excellent job of lubricating and protecting your Super Lock LSD from failure. Through use of this high quality liquid, your Super Lock LSD will last much longer if regular oil changes are performed.
OS Giken Super Lock Limited Slip Differential Unit for E46 M3, E34 M5, E39 M5, MZ4
(more info) The limited slip unit on the E46 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 E46 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 E46 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
1991-1995 E34 M5 sedan
1999-2003 E39 M5 sedan
2006-2008 E85 Z4M Z4 M Coupe, Z4 M Roadster
Differential
