With more than 30 years of experience in designing and manufacturing parts for race and high horsepower applications, OS Giken understands that the creation of a race car often extends beyond the normal limitations of "off the shelf" parts. Utilizing our accumulated knowledge and racing experience, we have engineered and produced a wide arrange of custom, limited production performance parts for various applications. Over the years, some of these limited production parts have grown in popularity and have progressed their way up into our product line-up.

For those with special limited production requests or questions regarding specialty parts, please feel free to contact us at your earliest convenience.

Below are some examples of the special parts that have become popular enough to make it into our regular product line up:

RB30 OS-E2996

Developed for those special customers who feel that 2.6 liters is just not enough.

OS Giken RB30kit contents

- 1 cyclinder block
- 1 billet crankshaft
- 6 billet-forged connecting rods
- 7 crankshaft main bearings
- 6 connecting rod bearings
- 6 forged aluminum pistons
- 1.3mm metal gasket (1.2mm, 1.4mm and 1.5mm
  gaskets available)
- 1 timiing belt
- 1 belt tensioner kit
- 14 custom made reinforced crank cap stud bolts and
  nuts
- 3 M6 bolts

Adjustable Cam Sprokets

Our adjustable cam sprocket teeth have been coated with our special hardening treatment to enhance durability and reduce wear.

OS-88 Six Speed Sequential Transmission for RB26DETT

We have designed this sequential transmission to specifically fit the engine characteristics of Nissan's RB26DETT engine to allow it to perform to its maximum potential. To withstand the incredible punishment a race tuned RB26DETT is capable of delivering to the drivetrain, we have used carefully selected forged and reinforced materials. By optimizing gear size and settings, we have increased the gear axis distance to 88mm, resulting in a 6-speed sequential transmission capable of withstanding up to 1500 horsepower. In addition, our original dog linked mechanism

Torque Capacity: 120kgs

Gear Type (Helical/Straight): Helical

Engagement Type (Synchro/Dog): Dog

Gear Ratios: