Black Forest Industries Releases TT RS Engine and Transmission Mounts Share Comments Another world’s first from Black Forest Industries, these engine and transmission mounts are specifically designed for the Audi TT- RS. While these mounts may appear similar to other models, these proprietary pieces feature exclusive specifications and dimensions to the 2.5 turbo engine found in the TT-RS. Through Black Forest’s extensive prototyping and testing procedure it was determined that the Stage 2 polyurethane was the ideal choice for both durability and driveability in this application. With the immense power potential of the 5-cylinder motor it is important not to overlook the importance of having additional supporting modifications to transfer as much of the energy as possible to the wheels, rather than waste it through excessive drive-train movement. These mounts do the job and are up to the task of spirited street driving as well as those all-out track days.