Products
Performance Clutch
Through our research and development of high performance engines, we realized the need for the production of higher quality and more durable clutch systems to meet the rigorous demands of racing
Limited Slip Differential
The OS Super Lock LSD is the culmination of over four years of extensive research and development that led to a revolutionary LSD design with the capacity to house an unprecedented number of friction plates
Close Ratio Gear Kit
OS Giken Close Ratio Gear Kits are developed for those seeking improved drive train reliability and faster lap times. Gear ratios are carefully calculated for each vehicle application for the sole intention to maximize your engine’s potential
Special Parts
Our extensive racing experience matched with our technical manufacturing knowledge, has led to the development of a wide assortment of custom and limited parts to meet the rigorous demands of the ambitious racing world
Ready to Upgrade Your Performance?
Experience the unmatched engineering of OS Giken — trusted by racers, tuners, and performance enthusiasts worldwide.