legacycentral bbs

the little box on the rt strut tower by the air box, i know most subaru's have them, what is it exactly, im not sure if i need it for my WRX swap and its been in the back of my mind for acouple weeks.
looks like only two heavy wires run to it?

A picture would be useful, but I think what you're talking about is the DRL resistor

Yep, it's the DRL resistor on the WRX. It also appears on auto tranny BC/BF legacies as the dropping resistor and lives in the exact same place...