Yamaha R7 GYTR Akrapovic Racing Line Exhaust System (Titanium)GYTR Akrapovic Racing Line Exhaust System (Titanium) YZF R7 This complete exhaust system is constructed with a high grade, lightweight titanium outer sleeve and end cap for muffler, with a stainless steel link pipe and headers. It weighs in at 3. 0 kg lighter than the standard stock exhaust. A noise insert is included in the package because the open version of the system has no catalytic converter and was developed for use on racetracks or closed