OS Giken - Race Performance Drivetrain Parts & Accessories

OS Giken (founded by Masaharu Okazaki in the early 1970s in Okayama, Japan) has earned legendary status crafting race-grade drivetrain components designed for performance and durability. Their U.S. distributor, OS Giken USA, offers JDM-expertise through clutches, gears, Super Lock LSDs, and tuning accessories—each 100% manufactured and assembled in Japan under strict quality-control standards.

The Super Lock LSD, born from four-plus years of R&D, supports up to 28 clutch plates and delivers smooth, progressive full locking without chatter—engineered for repeatable track performance. Their twin‑plate clutches and flywheel combos are precision-machined, increasing drivetrain efficiency and throttle response—built as complete systems inside exact tolerances. 

OS Giken’s passion for engineering extends to custom projects: RB26 stroker kits, TC24 L‑series twin‑cam heads, sequential gearboxes, and more—displayed globally and respected by enthusiasts and pro race teams. For serious tuners seeking drivetrain strength, reliability, and Japanese craftsmanship, OS Giken delivers pedigree-backed performance with world-class support.

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OS Giken 2016+ Mazda Miata AT/Fiat 124 Spider MT LSD OS Giken 2016+ Mazda Miata AT/Fiat 124 Spider MT LSD
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OS Giken 2016+ Mazda Miata AT/Fiat 124 Spider MT LSD
Differentials
OS Giken 2016+ Mazda Miata AT/Fiat 124 Spider MT LSDThis Part Fits: Year Make Model Submodel 2016-2020 Mazda MX-5 Miata Club 2016-2020 Mazda MX-5 Miata...
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OS Giken Mitsubishi GTO (3000GT) Z16ATURBO R Series Triple Plate w/Floating Center Hub Clutch OS Giken Mitsubishi GTO (3000GT) Z16ATURBO R Series Triple Plate w/Floating Center Hub Clutch
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OS Giken Mitsubishi GTO (3000GT) Z16ATURBO R Series Triple Plate...
Clutch Kits - Multi
OS Giken Mitsubishi GTO (3000GT) Z16ATURBO R Series Triple Plate w/Floating Center Hub ClutchThis Part Fits: Year Make Model Submodel 1991-1996 Dodge Stealth R/T Turbo...
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OS Giken Scion FRS / Subaru BRZ Upgraded Fork Release Sleeve Assembly OS Giken Scion FRS / Subaru BRZ Upgraded Fork Release Sleeve Assembly
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OS Giken Scion FRS / Subaru BRZ Upgraded Fork Release...
Clutch Rebuild Kits
OS Giken Scion FRS / Subaru BRZ Upgraded Fork Release Sleeve AssemblyThis Part Fits: Year Make Model Submodel 2013-2016 Scion FR-S Base 2013-2017 Subaru BRZ...
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OS Giken Toyota Scion ZN6 FR-S / Toyota GT86 STR2C Series 215mm (Soft) Dual Clutch Kit OS Giken Toyota Scion ZN6 FR-S / Toyota GT86 STR2C Series 215mm (Soft) Dual Clutch Kit
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OS Giken Toyota Scion ZN6 FR-S / Toyota GT86 STR2C...
Clutch Kits - Multi
OS Giken Toyota Scion ZN6 FR-S / Toyota GT86 STR2C Series 215mm (Soft) Dual Clutch KitThis Part Fits: Year Make Model Submodel 2013-2016 Scion FR-S...
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OS Giken Toyota GT86/Scion FR-S TR Series Dampened Twin Plate Clutch w/Fork Kit Conversion OS Giken Toyota GT86/Scion FR-S TR Series Dampened Twin Plate Clutch w/Fork Kit Conversion
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OS Giken Toyota GT86/Scion FR-S TR Series Dampened Twin Plate...
Clutch Kits - Multi
OS Giken Toyota GT86/Scion FR-S TR Series Dampened Twin Plate Clutch w/Fork Kit ConversionThis Part Fits: Year Make Model Submodel 2013-2016 Scion FR-S Base 2013-2017...
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OS Giken 13-15 Scion FR-S Clutch GTS1CD Dempened Includes Release Sleeve and Flywheel OS Giken 13-15 Scion FR-S Clutch GTS1CD Dempened Includes Release Sleeve and Flywheel
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OS Giken 13-15 Scion FR-S Clutch GTS1CD Dempened Includes Release...
Differentials
OS Giken 13-15 Scion FR-S Clutch GTS1CD Dempened Includes Release Sleeve and FlywheelThis Part Fits: Year Make Model Submodel 2013-2016 Scion FR-S Base 2013-2017 Subaru...
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OS Giken Toyota GT86/Scion FR-S Grand Touring Series Soft Aluminum Clutch OS Giken Toyota GT86/Scion FR-S Grand Touring Series Soft Aluminum Clutch
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OS Giken Toyota GT86/Scion FR-S Grand Touring Series Soft Aluminum...
Clutch Kits - Multi
OS Giken Toyota GT86/Scion FR-S Grand Touring Series Soft Aluminum ClutchThis Part Fits: Year Make Model Submodel 2013-2016 Scion FR-S Base 2013-2017 Subaru BRZ Limited...
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OS Giken Toyota COROLLA TE27 Super Single Alum Dampened Single Plate Clutch OS Giken Toyota COROLLA TE27 Super Single Alum Dampened Single Plate Clutch
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OS Giken Toyota COROLLA TE27 Super Single Alum Dampened Single...
Clutch Kits - Single
OS Giken Toyota COROLLA TE27 Super Single Alum Dampened Single Plate ClutchThis Part Fits: Year Make Model Submodel 1971-1974 Toyota Corolla Base
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OS Giken Toyota COROLLA 2TG Super Single Steel Dampened Single Plate Clutch OS Giken Toyota COROLLA 2TG Super Single Steel Dampened Single Plate Clutch
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OS Giken Toyota COROLLA 2TG Super Single Steel Dampened Single...
Clutch Kits - Single
OS Giken Toyota COROLLA 2TG Super Single Steel Dampened Single Plate ClutchThis Part Fits: Year Make Model Submodel 1971-1974 Toyota Corolla Base
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OS Giken 05/83-09/85 Toyota Corolla AE86 (MT Only) Super Lock LSD OS Giken 05/83-09/85 Toyota Corolla AE86 (MT Only) Super Lock LSD
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OS Giken 05/83-09/85 Toyota Corolla AE86 (MT Only) Super Lock...
Differentials
OS Giken 05/83-09/85 Toyota Corolla AE86 (MT Only) Super Lock LSDThis Part Fits: Year Make Model Submodel 1985 Toyota Corolla Sport GTS
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OS Giken Toyota COROLLA 4AG TS Series Twin Plate w/Soft Diaphragm Clutch OS Giken Toyota COROLLA 4AG TS Series Twin Plate w/Soft Diaphragm Clutch
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OS Giken Toyota COROLLA 4AG TS Series Twin Plate w/Soft...
Clutch Kits - Multi
OS Giken Toyota COROLLA 4AG TS Series Twin Plate w/Soft Diaphragm ClutchThis Part Fits: Year Make Model Submodel 1988-1991 Toyota Corolla GTS
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OS Giken Toyota COROLLA AE92 TS Series Twin Plate w/Soft Diaphragm Clutch OS Giken Toyota COROLLA AE92 TS Series Twin Plate w/Soft Diaphragm Clutch
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OS Giken Toyota COROLLA AE92 TS Series Twin Plate w/Soft...
Clutch Kits - Multi
OS Giken Toyota COROLLA AE92 TS Series Twin Plate w/Soft Diaphragm ClutchThis Part Fits: Year Make Model Submodel 1988-1991 Toyota Corolla GTS
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OS Giken Toyota COROLLA 4AG TS Series Twin Plate Clutch OS Giken Toyota COROLLA 4AG TS Series Twin Plate Clutch
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OS Giken Toyota COROLLA 4AG TS Series Twin Plate Clutch
Clutch Kits - Multi
OS Giken Toyota COROLLA 4AG TS Series Twin Plate ClutchThis Part Fits: Year Make Model Submodel 1988-1991 Toyota Corolla GTS
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OS Giken Toyota COROLLA AE101 TS Series Twin Plate Clutch OS Giken Toyota COROLLA AE101 TS Series Twin Plate Clutch
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OS Giken Toyota COROLLA AE101 TS Series Twin Plate Clutch
Clutch Kits - Multi
OS Giken Toyota COROLLA AE101 TS Series Twin Plate ClutchThis Part Fits: Year Make Model Submodel 1988-1991 Toyota Corolla GTS
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OS Giken Toyota COROLLA AE86 Super Single Steel Dampened Single Plate Clutch OS Giken Toyota COROLLA AE86 Super Single Steel Dampened Single Plate Clutch
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OS Giken Toyota COROLLA AE86 Super Single Steel Dampened Single...
Clutch Kits - Single
OS Giken Toyota COROLLA AE86 Super Single Steel Dampened Single Plate ClutchThis Part Fits: Year Make Model Submodel 1988-1991 Toyota Corolla GTS
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OS Giken Toyota COROLLA AE92 TS Series Twin Plate Clutch OS Giken Toyota COROLLA AE92 TS Series Twin Plate Clutch
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OS Giken Toyota COROLLA AE92 TS Series Twin Plate Clutch
Clutch Kits - Multi
OS Giken Toyota COROLLA AE92 TS Series Twin Plate ClutchThis Part Fits: Year Make Model Submodel 1990-1991 Toyota Corolla Base 1987-1991 Toyota Corolla DLX 1988-1991...
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OS Giken Toyota COROLLA AE101 TS Series Twin Plate Clutch OS Giken Toyota COROLLA AE101 TS Series Twin Plate Clutch
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OS Giken Toyota COROLLA AE101 TS Series Twin Plate Clutch
Clutch Kits - Multi
OS Giken Toyota COROLLA AE101 TS Series Twin Plate ClutchThis Part Fits: Year Make Model Submodel 1990-1991 Toyota Corolla Base 1987-1991 Toyota Corolla DLX 1988-1991...
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OS Giken Toyota COROLLA 4AGZ Super Single Steel Dampened Single Plate Clutch OS Giken Toyota COROLLA 4AGZ Super Single Steel Dampened Single Plate Clutch
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OS Giken Toyota COROLLA 4AGZ Super Single Steel Dampened Single...
Clutch Kits - Single
OS Giken Toyota COROLLA 4AGZ Super Single Steel Dampened Single Plate ClutchThis Part Fits: Year Make Model Submodel 1990-1991 Toyota Corolla Base 1987-1991 Toyota Corolla...
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OS Giken Toyota CELICA / MR-2 2ZZGE Super Single Steel Dampened Single Plate Clutch OS Giken Toyota CELICA / MR-2 2ZZGE Super Single Steel Dampened Single Plate Clutch
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OS Giken Toyota CELICA / MR-2 2ZZGE Super Single Steel...
Clutch Kits - Single
OS Giken Toyota CELICA / MR-2 2ZZGE Super Single Steel Dampened Single Plate ClutchThis Part Fits: Year Make Model Submodel 2000-2005 Toyota Celica GTS 2000-2005...
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Regular price$1,539.20
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OS Giken Toyota CELICA / MR-2 ST202 STR Series Twin Plate w/Soft Diaphragm Clutch OS Giken Toyota CELICA / MR-2 ST202 STR Series Twin Plate w/Soft Diaphragm Clutch
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OS Giken Toyota CELICA / MR-2 ST202 STR Series Twin...
Clutch Kits - Multi
OS Giken Toyota CELICA / MR-2 ST202 STR Series Twin Plate w/Soft Diaphragm ClutchThis Part Fits: Year Make Model Submodel 1986-1989 Toyota Celica GTS
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Regular price$1,726.40
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