Ended up getting my local dealer to re work a set of 49 State Legal Slip Ons. Not quite sure what they did to them, but the bike sounds awesome. ( I don´t think my neighbours would agree )The dealer assured me I didn´t need the Download, but I am sure the bike has lost some top end. Have also noticed some yellowing on the chrome exhaust covers. Got 3000 miles on the bike now and cannot think of any other bike I would rather have.