I just installed the 2011 rear 2 body mounts on my truck. And it did make a difference in the way it rides. I am happy I did it. I got everything from my local chevy dealership for $150. Anybody who spends a lot of time in their truck, I think would be glad they did it. All I have next is the sulastic shackles. If I don't get them for xmas, I plan on buying them shortly after.