Review on Energy Suspension 51114R Cummins Engine by Justin Pavelko

They require major modifications on anything but a brand new truck. Oh, and even then they need to be modified, you're better off buying raw urethane and melting it into your own molds and then do it to grind up and stuff into engine mounts. Then of course you would understand how awful your shaky diesel feels without absolutely no cushioning between the mounts and the frame. Save some money and improve your ride quality, if your mounts are bad replace them with original flea mounts.