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OS Giken

OS Giken Engine Performance Parts

Starting in the early 1960's, Osamu 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.

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. Production and design capabilities for engine and drivetrain components are OS Giken's specialty, but the company has the ability to design and build just about anything mechanical. As the design, construction, and usage of the automobile evolves, OS Giken looks forward to the challenges presented to find room for improvement!  

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OS Giken HA052-HA
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OS Giken HA052-HA Super Lock LSD Spec-S

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$1,667.50

Save: $217.50
Sale Price:

$1,450.00

Estimated Ship Date: Monday

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In Stock - 2 New In Stock

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OS Giken MN023-AJ6
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OS Giken MN023-AJ6 STR Series Clutch Aluminum Cover Dampened Single Plate w/Soft Diaphragm Release Assembly Included

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$1,713.50

Save: $223.50
Sale Price:

$1,490.00

Estimated Ship Date: Monday

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In Stock - 7 New In Stock

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OS Giken MN023-BJ5
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OS Giken MN023-BJ5 STR Series Clutch Aluminum Cover Twin Plate w/Soft Diaphragm Release Sleeve Assembly Included

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$2,208.00

Save: $288.00
Sale Price:

$1,920.00

Estimated Ship Date: Monday

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In Stock - 5 New In Stock

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OS Giken MT011-BJ5
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OS Giken MT011-BJ5 STR Series Clutch Aluminum Cover Twin Plate w/Soft Diaphragm Release Assembly Included Use Mitsubishi OEM

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$1,909.00

Save: $249.00
Sale Price:

$1,660.00

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken MT071-ALT
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OS Giken MT071-ALT Movement Alteration Kit

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$517.50

Save: $67.50
Sale Price:

$450.00

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken MT071-BF5
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OS Giken MT071-BF5 TR Series Clutch Aluminum Cover Twin Plate Flywheel Bolts Included Use Mitsubishi OEM Part Number [MD72522

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$1,909.00

Save: $249.00
Sale Price:

$1,660.00

Estimated Ship Date: Monday

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In Stock - 3 New In Stock

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OS Giken MT091-BC5
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OS Giken MT091-BC5 TS Series Clutch Steel Cover Twin Plate Use Mitsubishi OEM Part Number [MD725220] or Mazda FC3S Mainshaft

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$1,851.50

Save: $241.50
Sale Price:

$1,610.00

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken MZ091-HA
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OS Giken MZ091-HA Super Lock LSD Spec-S

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$1,667.50

Save: $217.50
Sale Price:

$1,450.00

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken MZ191-HCR
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OS Giken MZ191-HCR

Sorry, Fitment Information is Unavailable for this Product!

$713.00

Save: $93.00
Sale Price:

$620.00

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken NS001-012K
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OS Giken NS001-012K Clutch Release Sleeve Assembly

Sorry, Fitment Information is Unavailable for this Product!

$126.50

Save: $16.50
Sale Price:

$110.00

Estimated Ship Date: Monday

In Stock - 1 New In Stock

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OS Giken NS046-HA
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OS Giken NS046-HA Super Lock LSD Spec-S Side Flanges May Need Replacement, Call for Details

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$1,667.50

Save: $217.50
Sale Price:

$1,450.00

Estimated Ship Date: Monday

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In Stock - 11 New In Stock

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OS Giken NS112-BF1
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OS Giken NS112-BF1 TR Series Clutch Aluminum Cover Twin Plate Solid Hub

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$1,679.00

Save: $219.00
Sale Price:

$1,460.00

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken NS112-CH5
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OS Giken NS112-CH5 R Series Clutch Aluminum Cover Triple Plate w/Floating Center Hub

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$2,438.00

Save: $318.00
Sale Price:

$2,120.00

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken NS201-ALT15
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OS Giken NS201-ALT15

Sorry, Fitment Information is Unavailable for this Product!

$517.50

Save: $67.50
Sale Price:

$450.00

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken NS201-BC6
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OS Giken NS201-BC6 TS Series Clutch Steel Cover Dampened Twin Plate

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$1,909.00

Save: $249.00
Sale Price:

$1,660.00

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken NS201-EB
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OS Giken NS201-EB Clutch Alignment Tool

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$92.02

Save: $12.00
Sale Price:

$80.02

Estimated Ship Date: Monday

In Stock - 2 New In Stock

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OS Giken NS201-GN
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OS Giken NS201-GN 3-Speed Close Ratio Gear Kit w/ 5th Gear & Reinforced Input Shaft Standard or Hollinger type Available

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$4,239.82

Save: $553.02
Sale Price:

$3,686.80

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken TY021-ALT25
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OS Giken TY021-ALT25 Movement Alteration Kit

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$517.50

Save: $67.50
Sale Price:

$450.00

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken TY021-BF6
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OS Giken TY021-BF6 TR Series Clutch Aluminum Cover Dampened Twin Plate

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$1,978.00

Save: $258.00
Sale Price:

$1,720.00

Estimated Ship Date: Monday

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In Stock - 5 New In Stock

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OS Giken TY031-BF63
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OS Giken TY031-BF63

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$1,978.00

Save: $258.00
Sale Price:

$1,720.00

Estimated Ship Date: Monday

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In Stock - 1 New In Stock

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OS Giken TY031-EB
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OS Giken TY031-EB Disc Center Alignment Tool

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$92.02

Save: $12.00
Sale Price:

$80.02

Estimated Ship Date: Monday

In Stock - 2 New In Stock

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OS Giken TY031-HA
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OS Giken TY031-HA Super Lock LSD Spec-S Side Flange Modification Required

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$1,748.00

Save: $228.00
Sale Price:

$1,520.00

Estimated Ship Date: Monday

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In Stock - 4 New In Stock

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OS Giken AR011-HA
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OS Giken AR011-HA Super Lock LSD Spec-S Open Type

Sorry, Fitment Information is Unavailable for this Product!

$1,759.50

Save: $229.50
Sale Price:

$1,530.00

Estimated Ship Date: Not enough stock

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0 New In Stock

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OS Giken AR041-AF1
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OS Giken AR041-AF1 TR Series Clutch Aluminum Cover Single Plate Release Assembly Included

Sorry, Fitment Information is Unavailable for this Product!

$1,656.00

Save: $216.00
Sale Price:

$1,440.00

Estimated Ship Date: Not enough stock

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0 New In Stock

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OS Giken AR041-BF1
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OS Giken AR041-BF1 TR Series Clutch Aluminum Cover Twin Plate Release Assembly Included

Sorry, Fitment Information is Unavailable for this Product!

$1,909.00

Save: $249.00
Sale Price:

$1,660.00

Estimated Ship Date: Not enough stock

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0 New In Stock