Hi, I have just changed from Leo Vince twins to a single Exan silencer. I loved my Leo Vinces (they had DB plates in), def added power to my bike, but a bit louder than the Exan. I still don't understand how the Exan can be so small, light and Quiet! To be fair, I'd be dead happy with either and only changed as I got the Exan for a bargain and saved a (teensy weensy bit of) weight. Either are much better than stock IMHO. On top of that you don't have to change anything further. Just bolt it on and away you go.

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2010 XT660Z Blue, Exan can, UFO high front fender, SW Motech baseplate, heated grips, 12v point, Kevs Fuel & O2 mod, DNA Stage 2 Filter and cover, Givi tall screen, Mefo mfe 99s, Kevs throttle mod, TT high seat and 'compass'