Those pipes look very much like DP s out of England . Dave platt is an exhaust manufacturer and R3 owner . He sells a lot of those pipes worldwide . He also makes a shorter set called outlaws and the original Shorts for the classic and tourer . The pipes in the picture are DP custom silencers , the sales pitch says 10 to 15 hp increase with no remapping required . Go to Dave Platt on utube and there is a sound clip with a rocket . Also DP performance exhausts on ebay . Those pipes do sound wicked . I wouldn change them !