flanged

Fox Brake Caliper and Mounting Hardware with Flanged bushings for flotation.

I ordered a pipe from Kart Pipes - Your Go Kart Pipe Home with a flanged end. It looks awesome. I have not put it on yet. Will I get more power? What is the piece of wire they sent with it for? Do I need to modifiy anything else to accomadate this pipe? The attached pic is NOT my mini...