This is a drop in replacement for the cab and short hood on Kato SD40s and SD45s. Simply remove the low hood portion of the body, discard the cab, and replace with this piece. Holes are provided for all grab irons and sunshades. For headlight lenses, I recommend MV Lenses .046" clear lenses. The glass from the Kato cab can be re-installed in the new cab. The fireman's side wall on this model is blank as per Southern SD45s, however, its always a good idea to reference your prototype photos!