Dutch exhaust specialists BOS have developed a stunning street-legal silencer for the Triumph Speed Triple that is nearly half the weight of the factory fitted units. Available in either aluminium or carbon fibre, the BOS silencers weigh 5KG and 5.3 KG respectively for the pair, which is between 49% and 46% lighter than the stock items. Yet they are e-marked for road use and close inspection reveals that quality has not been compromised.