Akrapovic Racing Line Exhaust System - Carbon Fiber - Yamaha MT-07995155189 Product Description Exhaust has a lightweight carbon fiber muffler outer sleeve, combined with stainless steel link pipes and headers and finished with a carbon fiber end cap, to produce a system that is 3. 0 kg (41. 7%) lighter than stock Design features a shorter muffler for an enhanced sporty look, which exits on the side of the bike for visual impact Power is increased by 1. 9 kW (2. 6 hp) at 9,100 rpm when compared in back to back tests