This a Bosch 2-415-156-180 Fuel Injection Pump. The part is an RTO that has been remanufactured but please note fittings might have to be re-sealed or lubricated before use.
 
Specifications:
Manufacturer: Bosch
Part#: 2-415-156-180
Material(s): Steel, Aluminuim
Color(s): Gunmetal
Electrical: N/A
Overall Dimensions: 22"x14"x8"
Mount(s): N/A
Connection(s): N/A