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OS Giken

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 Nissan 350Z/370Z Z33/Z34 (VQ35HR/VQ37HR) Twin Plate Clutch w/ Extreme Lightened FW 184mm

OS Giken Nissan 350Z/370Z Z33/Z34 (VQ35HR/VQ37HR) Twin Plate Clutch w/ Extreme Lightened FW 184mm

NS112-BF14

Delivery time on request

OS Giken Mitsubishi LANCER EVO 1-3 4G63 TS Series Twin Plate Clutch

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

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

OS Giken Nissan SILVIA SR20DE /T TR Series Dampened Twin Plate Clutch

NS044-BF6

Delivery time on request

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Differentials & Gearing by OS Giken

OS Giken Mercedes 500E (R180 127mm Ring Gear ID) Super Lock LSD

OS Giken Mercedes 500E (R180 127mm Ring Gear ID) Super Lock LSD

MB251-HC

Delivery time on request

OS Giken Nissan Skyline R34 RB25DE/T / Silvia S15 SR20DET (MT Only) Super Lock LSD

OS Giken Nissan Skyline R34 RB25DE/T / Silvia S15 SR20DET (MT Only) Super Lock LSD

NS062-HA

Delivery time on request

OS Giken 72-88 Porsche 915/930 MT Various Super Lock LSD 28/25-456-12-10S COARSE Spline

OS Giken 72-88 Porsche 915/930 MT Various Super Lock LSD 28/25-456-12-10S COARSE Spline

PR014-HA

Delivery time on request

OS Giken 86-96 Chevy Corvette (MT) / 92-02 Dodge Viper (MT) Super Lock LSD

OS Giken 86-96 Chevy Corvette (MT) / 92-02 Dodge Viper (MT) Super Lock LSD

CH051-HA

Delivery time on request

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Engine Components by OS Giken

OS Giken Nissan Skyline RB31.5 Engine Kit

OS Giken Nissan Skyline RB31.5 Engine Kit

NS201-FC

Delivery time on request

OS Giken Nissan Skyline RB30 Engine Kit

OS Giken Nissan Skyline RB30 Engine Kit

NS201-FA

Delivery time on request

OS Giken Nissan Skyline RB26DETT Adjustable Cam Gear Set (Limited Quantity and Special Order)

OS Giken Nissan Skyline RB26DETT Adjustable Cam Gear Set (Limited Quantity and Special Order)

NS201-CGS

Delivery time on request

OS Giken Replacement Clutch Cover Bolt Set (18pcs) - For TS Multi-Plate Stamped Steel Cover

OS Giken Replacement Clutch Cover Bolt Set (18pcs) - For TS Multi-Plate Stamped Steel Cover

OS011-H000L-TS

Delivery time on request

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Fabrication by OS Giken

OS Giken BMW BMW E46 S54 Clutch Alignment Tool

OS Giken BMW BMW E46 S54 Clutch Alignment Tool

BM237-EB

Delivery time on request

OS Giken Toyota SUPRA 2JZGTE Clutch Alignment Tool

OS Giken Toyota SUPRA 2JZGTE Clutch Alignment Tool

TY031-EB

Delivery time on request

OS Giken Subaru SUBARU IMPREZA EJ20 Clutch Alignment Tool

OS Giken Subaru SUBARU IMPREZA EJ20 Clutch Alignment Tool

SB041-EB

Delivery time on request

OS Giken Mitsubishi MITSUBISHI LANCER EVO 10 4B11T Clutch Alignment Tool

OS Giken Mitsubishi MITSUBISHI LANCER EVO 10 4B11T Clutch Alignment Tool

MT071-EB

Delivery time on request

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Oils & Oil Filters by OS Giken

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Transmission by OS Giken

OS Giken Nissan Skyline FS5W30A Trans 3-Speed Close Ratio Gear Kit w/ 5th Gear and Reinf Input Shaft

OS Giken Nissan Skyline FS5W30A Trans 3-Speed Close Ratio Gear Kit w/ 5th Gear and Reinf Input Shaft

NS201-GN

Delivery time on request

OS Giken Nissan Skyline FS5W30A Trans 3-Speed Close Ratio Gear Kit w/ 5th Gear

OS Giken Nissan Skyline FS5W30A Trans 3-Speed Close Ratio Gear Kit w/ 5th Gear

NS201-GL

Delivery time on request

OS Giken Mazda RX7 FC3S 13BT 3 Speed Close Ratio Gear Kit

OS Giken Mazda RX7 FC3S 13BT 3 Speed Close Ratio Gear Kit

MZ111-GA

Delivery time on request

OS Giken OS-FR7 - 7 Speed Sequential (Gearbox Only)

OS Giken OS-FR7 - 7 Speed Sequential (Gearbox Only)

OS071-FR7

Delivery time on request

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Uncategorized by OS Giken

OS Giken Toyota V160 Center Hub R3C

OS Giken Toyota V160 Center Hub R3C

TY031-CH50i

Delivery time on request

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