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

This OS Giken 5-speed close ratio gear kit is specifically for the 1986-1991 Mazda RX-7 with the 13BT engine. If you're looking to get more out of your RX-7's acceleration and responsiveness, especially if you've modified your engine or plan on track use, this kit is a solid choice. It replaces the stock gear ratios with closer ones, meaning the engine stays in its powerband more effectively between shifts, making the car feel quicker off the line and through the gears.

OS Giken is well-known for its performance drivetrain components, and this gear kit is no exception. It's built with strong materials designed to handle the increased demands of spirited driving. The kit includes a new input shaft, ensuring proper alignment and strength for the entire gearset. Installing a close-ratio gear set is a significant modification that requires transmission disassembly, but the payoff is a much more engaging and potent driving experience, allowing your rotary engine to sing at its optimal RPMs more often.

When undertaking this kind of transmission upgrade, it's important to have all the necessary supporting components and tools ready. While this kit provides the core gearset and input shaft, consider having fresh transmission fluid, seals, and gaskets on hand. This is a substantial upgrade for enthusiasts looking to maximize their RX-7's performance potential.