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 revs and output to the drivetrain without loss. They are made of the highest quality materials and their durability is second to none.

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

Our OS Close Ratio Gear Kits are produced for those seeking improved drive train performance and faster lap times. Our gear ratios are carefully calculated for each application for the sole intention to improve your transmission's performance, and thus allow your engine to properly apply power when it counts. Each OS gear has been carefully designed and created using selected only forged quality materials, for extra strength and durability.

OS Giken understands to achieve the best racing performance extends beyond standard off the self parts. To satisfy the needs of our discriminating customers who always demand the highest performance possible, we allowed ourselves to remain flexible in our manufacturing to produce specialty "one-off" products to meet our customers' special needs. Over the years some of these specialty parts have become popular enough that we now include them in our official product line.