This Tin Man Fabrication Conversion Kit consists of a set of motor mounts and transmission crossmember that are designed to convert your H1 Hummer to be powered by a GM Duramax diesel engine and Allison transmission. These attractive mounts are laser cut and precision welded. They have proven themselves excellent for both low or high horsepower applications. Using these mounts with the H1 Hummer requires a minimum of a 2 1/2" body lift for sufficient clearance. Includes all necessary hardware. Made in the U.S.A.!