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Transmission / Gear Sets


OS Giken 3-Speed Close Ratio Gear Kit Nissan S14 Silvia
OS Giken 3-Speed Close Ratio Gear Kit Nissan S14 Silvia

OS Giken 3-Speed Close Ratio Gear Kit Nissan S14 Silvia

OS Giken 3-Speed Close Ratio Gear Kit Nissan S14 SilviaDescription3-Speed Close Ratio Gear Kit; w/ R..

$2,170.00

OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FC3S 13BT
OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FC3S 13BT

OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FC3S 13BT

OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FC3S 13BTDescription5-Speed Close Rat..

$2,910.00

OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FD3S 13BT
OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FD3S 13BT

OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FD3S 13BT

OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FD3S 13BT Description5-Speed Close Ra..

$2,910.00

OS Giken 5-Speed Close Ratio Gear Kit Nissan 240SX S13 / S14 SR20DET (FS5W71C Trans)
OS Giken 5-Speed Close Ratio Gear Kit Nissan 240SX S13 / S14 SR20DET (FS5W71C Trans)

OS Giken 5-Speed Close Ratio Gear Kit Nissan 240SX S13 / S14 SR20DET (FS5W71C Trans)

OS Giken 5-Speed Close Ratio Gear Kit Nissan 240SX S13 / S14 SR20DET (FS5W71C Trans)Description5-Spe..

$3,380.00


OS Giken 3-Speed Close Ratio Gear Kit Nissan S14 Silvia

OS Giken 3-Speed Close Ratio Gear Kit Nissan S14 Silvia

Description
3-Speed Close Ratio Gear Kit; w/ Reinforced Main Shaft
1st
2.717
2nd
1.722
3rd
1.232
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 engine’s 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.


OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FC3S 13BT

OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FC3S 13BT

Description
5-Speed Close Ratio Gear Kit; w/ Input Shaft; Uses OEM 5th Gear; Requires Mazda OEM 5.5mm Spacer [M505-17-316] & Roller Bearing [R502-17-306A]
1st
2.578
2nd
1.772
3rd
1.289
4th
1.000
5th
0.821
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 engine’s 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.


OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FD3S 13BT

OS Giken 5 Speed Close Ratio Gear Kit w/ Input Shaft Mazda RX7 FD3S 13BT

Description
5-Speed Close Ratio Gear Kit; w/ Input Shaft; Uses OEM 5th Gear
1st
2.578
2nd
1.772
3rd
1.289
4th
1.000
5th
0.821
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 engine’s 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.


OS Giken 5-Speed Close Ratio Gear Kit Nissan 240SX S13 / S14 SR20DET (FS5W71C Trans)

OS Giken 5-Speed Close Ratio Gear Kit Nissan 240SX S13 / S14 SR20DET (FS5W71C Trans)

Description
5-Speed Close Ratio Gear Kit; w/ Reinforced Main Shaft & Input Shaft
1st
2.596
2nd
1.765
3rd
1.250
4th
1.000
5th
0.833
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 engine’s 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.

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