KAPS Transmissions is the world leader when it comes to performance upgrades for the Subaru WRX STI.

If you are in need of a custom final drive ratio, we can engineer, design and manufacturer the parts for you.

For unique project cars, time attack, circuit or open class racing, we are able to meet your demands. Our final drives can handle the highest torque and horsepower Subarus, as we apply the same world leading technology from our dogkit manufacturing.

Contact us with your desired ratio.

Our other products available for the Subaru are found here.

LATEST NEWS - Another performance product being released by KAPS Transmissions is a RWD conversion kit for the Subaru STI. Stay tuned for updates!