Not really. The engine does feel more secure thou. I know it got rid of my dashboard vibrations I was having. When I put the trans mount on my exhaust got a little more dronish I guess you can call it just a slight bit louder, another then that I love them. My dad tried to talk me out of getting them but i had solid made from Ultra-high-molecular-weight polyethylene uhmw in my e30 that was a rough shaky ride but it didn't allow any movement in my driveline. So if I'm going to compare to that i would rate the uhmw a 2# out of 10#. Another thing these trucks arent new so we are not going to be able to drive around with a cup of coffee filled to the brim and not spill a drop like the cummins and duramax.
Get them you will be more then happy with them!