Gotham Rail 3021 - GP7-20 Cab Heater Pipe Return Duct 4x - HO Scale

A basic sheet metal duct that covers the water line that returns the hot water cab heat back into the cooling loop mounted to the hood on top of the field shunting relay box.  This has never been offered as a stand-alone detail part before and is missing a significant portion of models.  Now, not every engine has this and is something to look at prototype photos of.  Very early GP7’s lacked this as they used a different style of heater, and later engines and rebuilt engines often had this removed when electric heaters were installed. 

4 per package.