Clubman exhaust information?

Question for serious Anorak's,
Left over from the SX200 rebuild is a KBA clubman exhaust. Probably dates from mid nineties. Its been used but looks almost new.
The pipe is a bigger bore and is new. The only i d marking is KBA
Anyone recognise this and know what properties is has, such as power at top or bottom of the rev range? Is it a good thing?
Trevor S
Left over from the SX200 rebuild is a KBA clubman exhaust. Probably dates from mid nineties. Its been used but looks almost new.
The pipe is a bigger bore and is new. The only i d marking is KBA
Anyone recognise this and know what properties is has, such as power at top or bottom of the rev range? Is it a good thing?
Trevor S