That wont pass noise testing, just like the Laser dual cans for a R6 that Dallas got for his bike last week,
http://www.ebay.co.uk/itm/Yamaha-R6-...em3cbee e8d27 nothing in them as a lot of the silencing done on an R6 is in the exhaust collector system hidden away under the engine and out of site behind the fairing.
http://www.ebay.co.uk/itm/YAMAHA-YZF...em4cfb7 f97cf He's going to get Austin Racing build him one, probably like the one he had on the RSV4 where you fit different inserts for diffent dB levels
A earlier R6 Silencer would be a better option
http://www.ebay.co.uk/itm/GP-Style-E...em23110 6a24c