Help me identify this stuff, undertrays, shell, dyno

[daz75]

More crap out of the garage, the last of it i think i'll need help with

Guess this is some kind of motor checker, can't see a plug on it but has to battery connectors to the right, any ideas if this is how it runs, is it worth anything in this brusless age?



No idea what this is



Some kind of cat i'm guessing



No ideas again



Must be a cat, any ideas which?