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We've received numerous requests to manufacture a high-quality performance gearset for the AISIN AZ6 6-speed transmission, commonly found in the Nissan Silvia 200SX, Subaru BRZ, Toyota FRS, and GT86. After much consideration, we're excited to begin this project by engaging with the public for initial input.
Our gearsets have proven their reliability across various platforms, and it's time to extend this performance to the popular 6-speed Aisin gearbox.
Given the scale of this project and the significant funding required, we're offering a highly discounted price for the first 50 pre-orders. Full payment is required upfront, but if you need more time, please email us to discuss options.
This kit includes everything needed to address common issues with factory gears and forks: forks and gears, shafts, dog rings, and a heavy-duty mainshaft.
The gear ratios for ultimate strength and performance are as follows:
Speedtek Auto Racing Helical Cut Gearset:
S15 SR20DET 6-Speed Ratios (also applicable to BRZ & FRS):
Reverse: 3.43
These gearsets are designed for rapid quick shifts, offering a significantly different experience from the factory Aisin AZ6 synchronized transmission.
We currently have donor transmissions from the Nissan Silvia S15 and Subaru BRZ. We can also produce gearsets for Mazda, Toyota, and other models if someone donates a transmission, as the mainshaft and input shafts differ between models.
This kit ensures your transmission can reliably withstand over 600 BHP. Additionally, we're developing a race-spec lockout shifter for the S15 (not yet available for BRZ/FRS/GT86). If someone can donate a factory shifter, we will happily develop it for you. Stay tuned for updates!
We estimate these kits will be completed by mid to late 2024.
*Strictly no refunds on any Pre-Orders, please be mindful we are working at the fastest pace possible.
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