Why nobody in UK do aluminum exhaust? Never saw this really...

thanks very much for all your help.
does sound like a full on race bike.
only down side flat spot at 5500rpm even with k&n dyno jet kit k&n air filter and 2 hours on rolling road setup.
bike does scream and go past flat spot makes ducati sound quiet.
sounds awesum above 10000rpm and revs of the rev counter i love it.

the headers dont make the difference to the sound,its that banana can.
also when i cut my link pipe off,i could see that the welding internally was a rather thick and ground it down as much as i could before they were re-welded to get the angle right(slod to me as cbr but later realised they were cb1).
secondhand they are always a bargain as you lose some weight,gain power(when jetted),plus never gonna rot!very underrated