Many thanks for the reply, I am aware that the standard 'cans' are as you say a single silencer box with dual tips, however on looking at the various aftermarket options they all appear to be twin individual cans including, I thought, the akrapovic, the akras for the ten I know have an additional outer shield which appears to be riveted on and which my X cans do not. Looking at the scorpion cans they appear to be much shorter than normal, scaling from various google images would suggest approx 12" as you suggest however the arrows, gpr et al all appear to look like 'normal' length cans.

I like the weight saving offered from the single can combined with the better flow charectaristicts however I'm not keen on the 'look'. I have considered a single can with a dummy secondary can to retain the looks though. Granted, luggaged up, the 'look' is pretty much negated anyway as they are well hidden. I'm only really looking into this as I have a set lying around and if the weight difference between the standard cans on the X and these akras is anything to go by then it's definitely worth doing on the ten. Not interested in increased noise or negligible power gains, ive got my gsxr for that.

Can anyone else shed any light...

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