OS Giken OS-88 Standard-Ratio 6-Speed Sequential Gearbox for 1989-2002 R32-R34 GT-R - NS201-FB1

Six-speed sequential transmission configuration

Standard gear-ratio set

Non-synchromesh dog-ring shift mechanism

Helical-cut gears

88mm gear-axis spacing

Up to 1,500 hp capacity

Includes bellhousing and shifter assembly

Manufacturer Part Number: NS201-FB1

Series: OS-88

Configuration: Standard-ratio 6-speed sequential gearbox

Shift Mechanism: Non-synchromesh dog ring

Gear Type: Helical cut

Gear-Axis Spacing: 88mm

Power Capacity: Up to 1,500 hp

1st Gear Ratio: 2.609

2nd Gear Ratio: 1.934

3rd Gear Ratio: 1.521

4th Gear Ratio: 1.210

5th Gear Ratio: 1.000

6th Gear Ratio: 0.852

Included Components: Gearbox, bellhousing & shifter assembly

OS Giken is a Japanese performance-parts manufacturer specializing in high-performance drivetrain and engine components. Officially founded in 1973, the company is headquartered in Okayama, Japan, where its products are manufactured and assembled under strict quality-control standards. OS Giken is best known for its multi-plate clutch systems, Super Lock limited-slip differentials, close-ratio gearsets and competition transmissions. Its engineering philosophy focuses on improving power transfer, durability and drivability through original mechanical designs rather than simply modifying factory-style components.

For Nissan Skyline GT-R and Nissan GT-R applications, OS Giken offers drivetrain upgrades for the R32, R33, R34 and R35 platforms. Available products include twin-, triple- and quad-plate clutch kits, front and rear Super Lock LSDs, clutch service components and the OS-88 six-speed sequential transmission for RB26-powered Skyline GT-Rs. The OS-88 is designed around the RB26DETT and is rated by OS Giken for applications producing up to 1,500 horsepower. For the R35 GT-R, OS Giken offers a Super Lock rear differential designed to provide smooth, progressive engagement and strong lock under power. Whether preparing a street-driven Skyline or a dedicated competition build, OS Giken provides precision drivetrain components developed for demanding power levels and performance use.

OS Giken does not publish one fixed warranty period covering every product. Warranty duration and coverage vary by product line, and all claims are subject to inspection and approval by OS Giken or the applicable manufacturer. Approved claims may result in repair or replacement of the affected product.

Warranty coverage does not apply when damage is caused by:

• Abuse, negligence or mishandling
  
• Incorrect application or unverified fitment
  
• Improper installation or product modification
  
• Damage unrelated to a manufacturing defect
  

To begin a claim, contact Elite GT-R Parts with:

• Your order number and OS Giken part number
  
• A detailed description of the issue
  
• Clear photographs or video of the product
  
• Vehicle, installation and operating information

Do not disassemble, modify or return the product before receiving instructions. Keep the product, packaging and all related installation documentation, as inspection may be required. Final warranty eligibility, coverage period and resolution are determined by OS Giken under the terms applicable to the specific product.