Another "What part is this?" question

[ruf_round_edges]

Can anyone tell me what this is? I found it laying around, it says "Mitusbishi Power TR Unit" on it. Also, what is the MPI fuse? Fuel injection? Thanks for the help.

Will

 

[TD05HTalon]

it's the power transistor that bolts on to the intake manifold. a 1G one bolts on the end near the ignition coil pack. the 2G one bolts near the middle of the manifold with the plug pointing up. can't tell if it's a 1G or 2G from the pic though.