Very ligth, nice sound, a litlle louder, but with we put the dbkiller cutting the metal grill, so iit make less louder at low and middle revs. Together with the ECU Factory and the rally air filter the bike fels ligther, because the power are there, with a fast response. Feels like anothe bike. Just two things to improve, heat protection for the boot sole (I put a standard one from a big asian marketplace) and the dbkiller not match the bolt to the muffler ,perhaps they confuse the rigth one, because it fits on the muffler.
