Interesting finished exhaust on ebay at present. Not seen these type before.
http://www.ebay.co.uk/itm/KTM-990-super ... 5719014%26

I had a Blue Flame like that on my Cbr600 in 1999. A mate had one on his R1 both shit themselves prematurely. I hope they build them a bit tougher now or those cans will have a short life on a 1000cc twin.

If anyone needs a collection from there, it's just round the corner from my office.