For riders who do not want to make any major modifications to the Yamaha R6, the Akrapovic Slip-On system is an excellent choice, giving a lot of results for a simple installation. The Akrapovic Slip-On system is an outstanding combination of high quality workmanship, performance, affordability and aesthetic enhancement. The distinctive, street legal Slip-On HEXAGONAL muffler fits well in the original mounting position and goes fantastically with the lines of the bike. For more race-oriented riders we offer a completely open version - the Akrapovic Slip-On Megaphone.