APR is pleased to present the ultimate transmission control unit (TCU) upgrade for the DL501 S Tronic transmission found on the Audi C7 A6 and A7 3.0 TFSI! The APR TCU Upgrade remaps the factory S Tronic transmission, adding several features and enhancements while simultaneously providing a smoother and more enjoyable driving experience. Please note, this transmission is only available on the C7 A6 and A7 outside of the North American market. Read More…