You are lucky they make new sleeves for the Micron. I smashed my Leo Vince SBK last year, and I can't replace the sleeve....basically I'd have to buy a new one.
I just installed two Akropovic Carbon Fiber exhaust on my g/f's brothers bike last night.....OMFG that ***** is bad ass! This is the brand I was originally going to go with last year for my R1, but I saved myself 1/2 the cost going with the Leo Vince. Well F it! I'm going with the Akropovic this time!!!