These high performance motor mounts are the original! Since 2013, DHD engine mounts have set the standard for upgraded Duramax engine mounts. Our design maintains engine alignment and engine height while adding the strength and durability of a high performance polyurethane. The polyurethane we use is resistant to thermal and chemical breakdown which makes it superior to OEM rubber mounts. DHD's robust mounts will take the shake out of your engine at idle and provide a stiff, fixed connection for your engine during heavy loads. Our mounts are a must for any street truck making higher then stock horsepower!