In 1975, OS Giken made its memorable entry into the racing world with its unparalleled Four Valve DOHC TC16-MAII/TC24-B1 engine and firmly established itself as one of Japans most innovative race engineering companies.
Because all of OS Gikens designs and concepts are based on sound engineering and quality manufacturing, their reputation for reliable performance and durability is unparalleled
Including but not limited to these applications:
E36 Part #: BM143-HA
E46 Part #: BM237-HA
M3( MT / AT)
E46 E60/61 E63 E85 Part #: BM235-HA
323i ( AT only ) 325i ( AT only ) 328i ( AT only ) 330i ( MT / AT ) 525i M52 M54 (AT only) 630i ( AT only ) E85 3.0i ( AT only )
E92 M3 Limited Slip Diferential Part #: BM533-HC
TCD Style differential
And Clutches for varying horsepower and applications. There are too many to chose from. so give me the make, model, year, application (drag, street, course, drift) and WHP, so I can suggest the proper clutch.
Here is a little info on the clutches OS Makes:
Through our research and development of high performance engines, we realized the need for the production of higher quality, more durable clutch systems to meet the rigorous demands of race and sport driving. Our OS multi-plate clutch is able to transmit engine revolutions and output to the drive train without loss. They are made of the highest quality materials and their durability is second to none. Our continual research and development has brought about many improvements since our multi-plate clutch line's original debut in 1983 and we are confident that our clutches can meet the demands of even the most heavily modified vehicles.
Distinctive Features of the OS Multi-Plate Clutch:
In spite of its decreased diameter, our clutch allows for extremely efficient power transfer and improved engine response. Our redesigned leverage mechanism of the diaphragm spring on the center cover results in higher pressure of the clutch disk while reducing pedal effort. In addition, ventilation holes are designed to reduce heat generated inside the clutch system and allows for the friction plate dust to exit outside the clutch system, thus increasing reliability and safety. All OS Giken clutches include a corresponding performance flywheel to ensure maximum performance and unlock your vehicle’s potential.
OS Super Lock LSD
OS Giken utilized its accumulated racing knowledge and engineering experience to develop its own limited slip differential. Four years of extensive research and development lead to a new and revolutionary LSD design with the capacity to house an unprecedented number of friction plates (up to 28 plates in total) and thus the OS Super Lock LSD was born. The increased number of plates directly has not only dramatically improved our LSD design's locking force and enables it to lock fully and completely. An added benefit to being a fully locking mechanism is that less heat is generated, thus resulting in incredible durability and reliability.
As expected from OS Giken, our LSDs are not only made from the highest quality materials, our precise machining, forged gears, and sound engineering makes our LSDs the most durable and reliable race performance LSDs available.
In addition, our design allows for the initial torque setting and lock timing to be customized to best fit you vehicle's everchanging set-up and course/road conditions. (Limited to Spec-X LSDs only)