What I noticed: The purpose of the dog bone bush is to dampen the movement of the engine especially under hard acceleration and breaking. I noticed a big difference with this mod, acceleration and breaking is much  more responsive. Since the engine movement has decreased, the ride feels very solid on the whole. It now feels as if the engine power is being transferred to the wheels a lot more efficiently. (Note: This Modification was before I installed the VF Engineering Lower Pendulum Mount)