This kit contains (2) laser-cut 1/4" mild steel plates that bolt to the left and right side of the OM606 engine block, plus 12 bolts/washers. They were designed using an NA 606. Material is pickled and oiled A36, which welds very nicely. You weld your own material onto these 2 plates to create your own motor mounts. These are said to work with the M104, as well.
If you'd like to compare fitment with your OM601, OM602, OM603, OM604 or OM605, contact me to discuss.