ZX6R exhuast slip on

Hey guys,
Im looking a buying at Two Brother exhuast slip on but would like to know if i get the mid pipe section with it or do i have to make one up?? and how would performance be like?
Also i understand tthat the rear fender would have to be altered. Would i have to buy a new rear fender?
Any help would be greatly appreciated.
thanks
jimmy
Im looking a buying at Two Brother exhuast slip on but would like to know if i get the mid pipe section with it or do i have to make one up?? and how would performance be like?
Also i understand tthat the rear fender would have to be altered. Would i have to buy a new rear fender?
Any help would be greatly appreciated.
thanks
jimmy