OS Giken – 5-Speed Close Gear Kit w/ Input Shaft – Mazda RX-7 FC3S

SKU: 3497
Available on back-order


Revolutionize your driving performance with OS Giken’s close-ratio gear sets, meticulously designed for racing prowess. These sets offer enhanced gear strength and optimal ratios, making them a perfect fit for both racing enthusiasts and street-driven vehicles. Crafted for the Mazda RX-7 FC3S (R15M-D), these gear sets boast strengthened input shafts and accommodate applications up to 600hp. Elevate your vehicle’s capabilities with precision-engineered gear ratios: 1st Gear (2.578), 2nd Gear (1.772), 3rd Gear (1.289), 4th Gear (1.000), and 5th Gear (0.821). Unleash the power and experience the performance upgrade with OS Giken’s cutting-edge gear sets.

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Enhance your racing experience with OS Giken’s close-ratio gear sets, engineered for superior gear strength and optimized ratios, making them ideal for high-performance racing applications. The innovative design retains standard synchromesh components and incorporates a helical gear design, ensuring a noise level comparable to a typical gear set. Notably, this upgrade isn’t limited to the track; it’s also a stellar choice for street-driven vehicles. The gear ratios are finely tuned for precision performance: 1st Gear (2.578), 2nd Gear (1.772), 3rd Gear (1.289), 4th Gear (1.000), and 5th Gear (0.821). Specifically crafted for the Mazda RX-7 FC3S (R15M-D) with a reinforced input shaft, these gear sets accommodate applications up to 600hp, specifically for R15M-D transmissions. When making a purchase, kindly specify the vehicle model for a tailored fit. Elevate your driving experience with OS Giken’s high-performance gear sets.


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