Akrapovic Yamaha R7 21-25 Racing Line Exhaust System (Titanium) - S-Y7R11-HAPTThis is an EC ECE type approved complete exhaust system constructed with a high grade, lightweight titanium outer sleeve and end cap for the muffler, with a stainless steel link pipe and headers, weighing in at 0. 7 kg lighter than the standard stock exhaust. A catalytic converter is included in the package, complying with the current Euro5 approvals. There are performance increases of 1. 5 kW (2. 0 hp) at 9,200 rpm and an added +1. 1 Nm at 5,000 rpm