Transmission Internals

Built for your Subaru WRX and STI, our Transmission Internals collection offers a wide range of high-quality parts designed to enhance your vehicle’s drivetrain performance and reliability. Whether you’re upgrading for better power handling or replacing worn components, these parts help maintain smooth shifting and durability under demanding conditions.

Inside this category, you’ll find gears, synchros, bearings, shafts, and other essential transmission components engineered to meet the needs of Subaru enthusiasts. Each product is selected to improve response and extend the life of your transmission, ensuring your car performs at its best on the street or track.

Shop transmission internals for your Subaru WRX and STI at Subimods.