This is a high hood kit for SD35/40/45s and GP35s It was designed around Atlas and Kato shells. The installation is similar to Cannon and Co. HO scale high hood kits, in that the low hood must be removed and the number boards must be removed off of the cab. This will allow you to reuse the factory cab. All mounting holes for grab irons are printed, though they may need to be cleared with a #80 drill bit. Kit contains two high hoods!