twin deps aremore for top end and you dont gain much at all... they dont sound any different to a 30mm+ bigbore exhaust. Will get more of a performance gain buy getting a well known bigbore pipe ( like FMF etc.. ) they do look nice, but if your only doing it for looks, why not get a IXIL carbonfibre twin
Do you have the link for the IXIL Carbon Fiber Twin?