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 Nissan Skyline BNR32/33 Manual Clutch Release Movement Alteration Kit NS201-ALT22
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OS Giken Nissan SR20DET Super Single Aluminum Clutch Overhaul Kit A NS044-AB80A
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OS Giken Nissan SKYLINE RB26DETT 215mm TS Twin Disc Overhaul Kit B NS201-BC60B
OS Giken Replacement Clutch Cover Bolt Set (18pcs) - For TS Multi-Plate Stamped Steel Cover OS011-H000L-TS
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OS Giken Toyota Supra JZA80 2JZ-GTE CD091 6MT w/ 24t Nissan Spline Hub TR Series Twin Plate Clutch TY031-BF62
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OS Giken Nissan GTST R33 RB25DET Skyline Super Single Steel Dampened Single Plate Clutch NS225-AA8
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OS Giken Mitsubishi LANCER EVO 4-9 4G63 Clutch Rebuild Kit B for MT031-BH6 MT031-BH60B
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OS Giken Mitsubishi LANCER EVO 4-9 4G63 Clutch Rebuild Kit A for MT031-BH6 MT031-BH60A
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OS Giken Clutch Overhall Kit A for Subaru WRX STi EJ20/25 SB041-BF60A
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OS Giken Overhaul Kit B for STR2CD Kit for Z33 NS111-BJ60B
OS Giken  | MPN: NS111-BJ60B
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OS GIken Overhaul Kit A for STR2CD Kit for Z33 NS111-BJ60A
OS Giken  | MPN: NS111-BJ60A
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OS Giken Datsun 280Z / 280ZX / 300ZX (Long Nose R200) Super Lock LSD NS082-HA
OS Giken Nissan Skyline RB26DETT Adjustable Cam Gear Set (Limited Quantity and Special Order) NS201-CGS
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OS Giken Nissan GT-R R35 (TCD Rear) Super Lock LSD NS251-HA
OS Giken  | MPN: NS251-HA
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OS Giken Porsche PDK Transmission (OEM LSD Diff) Super Lock LSD PR154-HC
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OS Giken Nissan 370z TR2C Overhaul Kit (VQ35HR Only) NS112-BF50A