OS Giken

From Mr. Okazaki's humble beginnings tinkering with motorcycle parts at home, OS Giken has evolved and grown over the years, building and cementing a reputation as one of the best racing drivetrain parts manufacturers in the world. 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.

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711 products

OS Giken  | MPN: TY021-BC040C
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OS Giken Mazda RX-7/RX-8 TR2C Overhaul Kit A MZ101-BF50A
OS Giken  | MPN: MZ101-BF50A
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OS Giken Mini Cooper/S R50/R53 STR1CD Overhaul Kit B (for MN021-AJ6) MN021-AJ6EB
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OS Giken Mini Cooper/S R50/R53 STR1CD Overhaul Kit A (for MN021-AJ6) MN021-AJ6EA
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OS Giken Replacement Release Sleeve Bearing for Movement Alteration Kit NS201-ALT15K
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OS Giken Nissan 300ZX (VG30DETT) Overhaul Kit B (for NS101-BC6) NS101-BC60B
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OS Giken 07-13 Mazda Mazdaspeed 3 Overhaul Kit A (For MZ141-BF6) MZ141-BF60A
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OS Giken Toyota Supra JZA80 2JZ-GTE 6MT w/ 26 Spline Hub (6-C) TR Series Twin Plate Clutch TY031-BF61
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OS Giken Toyota Supra JZA80 2JZ-GTE Overhaul Kit B (for TY031-BC6) TY031-BC60B
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OS Giken Nissan Skyline GTR/GTS RB20/25/26 - TS2BD Overhaul Kit A NS201-BC40A
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OS Giken 36mm Toyota Supra JZA70 - 1JZGTE R154 Gearbox Super Single (Alum Cover) Overhaul Kit A TY021-AB80A
OS Giken Replacement 28mm Release Sleeve Assembly - Nissan Movement Alteration Kit NS201-ALT28K
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OS Giken Nissan 350Z/370Z Z33/Z34 (VQ35HR/VQ37HR) Overhaul Kit B (for NS112-BF14) NS112-BF10B
OS Giken Toyota Supra 2JZGTE V160 Gearbox TR2CD Overhaul Kit A TY031-BF60A