This stunning system is constructed entirely from lightweight high-grade titanium. Its beautiful and sleek design is finished with a central muffler with two pairs of eye-catching double round tailpipes – available in either handmade carbon fibre or sandblasted and coated titanium for increased durability – and it incorporates exhaust-valve housings cast in the Akrapovič in-house foundry. The sound has been tuned to deliver a fulfilling acoustic statement every time the car fires to life. The Evolution Line (Titanium) produces a deep, strong growl from the V8 turbo engine, giving the driver and passengers a true feeling of the immense torque the engine has to offer. This is achieved through a carefully designed X-crossing element in the link pipes that influences the sound. This allows the exhaust gases to mix from both sides of the engine, placing the resulting combination on par with a finely tuned musical instrument and creating incredible high-frequency overtones as the revs rise, all without any compromise to aural clarity and comfort. Fully ECE-compliant and with a simple plug-and-play installation, with no need to remap the ECU, the Evolution Line (Titanium) also adds increased performance to the stunning visual appeal. Test gains achieved by the Akrapovič technicians in controlled conditions show both power and torque gains over the Porsche sport exhaust system of +8.2 kW at 5,600 rpm and +16.6 Nm at 2,400 rpm, respectively, making the system an impressive addition to the Porsche Cayenne Turbo (536).The sound can be further controlled with the addition of the optional Akrapovič Sound Kit, which offers increased operational features over the exhaust system. When fitted with the optional Akrapovič Sound Kit, ECE type approval is no longer valid.ECE type approval is only valid for cars equipped with otto/gasoline particulate filter.