Theseurethane transmission mounts are designed for a great balance between transmission control and vibrations. They have been tuned for both street andtrack applications. Replace your stock rubber mounts for improvedthrottle response and reduced driveline movement. *Features Designed for street and race cars Direct replacement for stock rubber mount Uses factory metric nuts (not included) Stainless Steel construction for rust free operation Interlocking design for fail safe operation Fast installation These urethane mounts use an interlocking design stainless steel design similar to our engine mounts. The internal stainless structure "floats" in the urethane, so your chassis is riding on a large quantity of urethane for a giving but secure ride without the high NVH levels of other designs.