Dito. Twin's, as we all know and as mentioned earlier in this post, have power pulses and it is these and the associated increased heat from a twin as opposed to an i4 that make the carbon brittle and slowly but surely brake it down. Apparently.
I know and have seen alot of people that run carbon cans on twins and don't seem to have any problems, however I've also seen and heard of a fair few brittle, faded and crumbley (is that a word?) carbon cans. Personally I'd go for titanium just to be on the safe side, although while I do think carbon cans look better, titanium cans, especially Akros, don't exactly look bad do they so could be worse.