OS Giken
Starting in the early 1960's, Masaharu Okazaki set out on a mission to build high-performance Japanese race engines to compete with the championship-winning European offerings of the time. Armed only with a pure passion for motorsports and an innate ability to absorb information, he basically took things apart in his garage, figured out how they work, and designed improvements to increase performance. A self-educated man, he originally began working on motorcycles and eventually moved on to parts development for 4-wheel automobiles. Mr. Okazaki founded his company, OS Giken, in the early 1970's with strength, durability, and the pursuit of high performance in mind; these goals for parts development remain true today and OS Giken has established itself in the upper-echelon for designing and manufacturing high quality, high performance, and supremely durable parts.
Officially founded in 1973, the company headquarters and factory are located in Okayama, Japan. All OS Giken parts are 100% manufactured and assembled in Japan, under very strict quality-control guidelines.
Clutch & Flywheel by OS Giken
OS Giken Mitsubishi LANCER EVO 1-3 4G63 TS Series Twin Plate Clutch
MT011-BC3
Delivery time on request
OS Giken STR Twin Plate Clutch for Toyota FA20A GT86 Overhaul Kit A
TY421-BJ50A
Delivery time on request
OS Giken Nissan SILVIA SR20DE /T TR Series Dampened Twin Plate Clutch
NS044-BF6
7-10 business days delivery
Differentials & Gearing by OS Giken
OS Giken Super Lock LSD for Nissan Skyline R34 RB25DE/T / Silvia S15 SR20DET (MT Only)
NS062-HA
7-10 business days delivery
OS Giken Super Lock LSD for 86-96 Chevy Corvette (MT) / 92-02 Dodge Viper (MT)
CH051-HA
Delivery time on request
Engine Components by OS Giken
Fabrication by OS Giken
Transmission by OS Giken
OS Giken Nissan Skyline FS5W30A Trans 3-Speed Close Ratio Gear Kit w/ 5th Gear and Reinforced Input Shaft
NS201-GN
Delivery time on request
OS Giken Nissan Skyline FS5W30A Trans 3-Speed Close Ratio Gear Kit w/ 5th Gear
NS201-GL
Delivery time on request
