its an 07-08 underseat exhaust.
So far i've found an
IXIl which actually is mounted on the side £350
Akrapovic with removable baffle £520
Yoshi Stainless race no baffle £360
Two Brothers Race no baffle £420
Micron one off titanium race muffler with hydratech front pipes system £440
From you tube Akra sounds the best out of yoshi and two bros but i dont know if its £200 nicer!!