Just a capacitor that will do nothing if you have poor ground connections. Poor ground connections can only be fixed one place-at the point of ground. I dont see how connecting this to + and - would do anything for ground connections.
I know that Bill guy. His car is so fucked up. He ran PVC intercooler piping and then ran C16 and disconnected the wastegate and blew his motor. I guess "just to prove a point".