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The OS Giken close-ratio 3-speed gear kit for Nissan Silvia (S14) supplies gear ratios of 2.717, 1.722 and 1.232 to tighten up shift spacing for the S14 chassis. These transmission internals are intended to replace factory gears to alter drive gearing and optimize the engine powerband for track or performance-focused builds where closer spacing between gears is required for consistent acceleration.
OS Giken Nissan Silvia (S14) 3-Speed Close Ratio Gear Kit 2.717/1.722/1.232
