2 into 1 exhaust

i have been looking for new exhausts for the ZZR250 but they seem pretty elusive
but i found someone that can supply a new 2into1 system
does anyone know if there is any benefits or not by going this way

Why do you need a new exhaust for the ZZR250 ??
If you want to go faster, get a bigger bike

there is no benefit in getting a 2 into 1, 2 to 2, or what ever set up on a zzr250.