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OS Giken 5-speed Close Ratio Gear Kit Honda Civic EG6 EK4(9) B16A B16B

SKU. 03914    Part No. HA031-GC  

Main photo of Gearsets by OS Giken HA031-GC 5-speed Close Ratio Gear Kit Honda Civic EG6 EK4(9) B16A B16B

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All parts sold on this site are Competition Parts intended for Racing and Off-Road use only.
⚠ WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to
  • Overview

    Quick Info

    • Set of 5 Gears

    • Closer Gear Ratios

    • Stay in the Powerband

    Product Details

    OS Giken 5-speed close ratio gear kit Honda Civic EG6 EK4(9) B16A B16B
    Performance driving and high output engines puts strain on the drivetrain and can sometimes lead to failing components, such as broken gears or input shafts. The goal of the OS Giken Close Ratio Gear Kit is to reinforce the transmission internal components while maximizing an engines potential by providing custom gear ratios for performance driving.

    Each OS Giken gear component is designed and created from high-quality forged materials, and then undergoes hard shot peening, resulting in increased strength and durability. Furthermore, the gears are helical-cut, rather than straight-cut, to maintain a quiet and smooth operation, accomplishing full comfort for street driving as well as reliability for racing.

    Images used may be generic. Actual product may vary.
  • Specifications +
    Brand OS Giken
    Part Number HA031-GC
    Category Vehicle Parts ▸
    Transmission & Drivetrain ▸
    Item Code 03914
    Length 15.0 in.
    Width 15.0 in.
    Height 4.0 in.
    Weight 30.00 lb.
    Created Sunday, January 1, 2012
    Last Updated Thursday, December 20, 2018
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