Evolution Line Exhaust SystemThe combination of race-proven, lightweight materials, exceptional production quality, perfect design, amazing sound, and top performance makes this exhaust a must-have for discerning riders that demand the bestIt is constructed with a carbon-fiber muffler outer sleeve and end cap, with a fully titanium link pipe and inner muffler structure, matched to high-grade titanium alloy for the headers and collectors, resulting in a full system that is 44% lighter than stockDeveloped for use on closed-course competition circuits, this racing track–oriented system requires mandatory remapping and removal of the passenger footrestIt delivers increases of power and torque of 4.0 kW (5.4 hp) at 13,000 rpm and 3.8 Nm at 7,700 rpm when measured in back-to-back comparisons against an Aprilia RSV4 with a standard stock system on the in-house dynoThis race-developed system delivers a distinctive deep, sporty sound, perfectly endorsing the Akrapovic character