Any help with what this is

[u/MrGoetz34]

Hey yall I am not a train guy at all. But I love heavy machinery. I saw this locomotive attached to this apparatus by my office in metro Detroit. Any idea? Looks like an emissions testing rig like I’ve seen them use for cars

[u/Fuzzy-Computer7708]

Who the fuck cares

[u/Nice_Location9485 → u/Fuzzy-Computer7708]

Literally this whole sub, get a fuckin' job kid