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OS Giken Close Ratio Gear Kit for MAZDA RX7 FD3S (5-speed w/ input shaft)

OSGiken

OS-MZ121-GC


5-speed close ratio gear kit with input shaft

OS Giken Close Ratio Gear Kits are produced for those seeking improved drive train performance and faster lap times. OS Giken gear ratios are carefully calculated for each application for the sole intention to improve your transmission's performance, and thus allow your engine to properly apply power when it needs most. Each OSGiken gear has been carefully designed and created using selected forged quality materials for extra strength and durability. In addition to using forged materials, our gears are also undergo hard shot peening to further strengthen them and increase their load capacity and long term reliability.

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