This product is constructed from high-grade lightweight titanium featuring a central muffler with two pairs of striking double round handmade carbon-fibre tailpipes, which contain acoustic reflectors, designed to enhance the sound experience for both the driver and passengers. The valves on both sides of the muffler control gas flow, with housings cast in-house. The weight is 44.8% (14.6 kg) lower than the sport stock exhaust. A power gain of 4.2 kW (5.7 hp) at 5,950 rpm and torque increase of 8.0 Nm at 2,150 rpm were achieved when tested on The Akrapovic dyno against a Porsche Cayenne S E-Hybrid Coupe with a stock sport exhaust system.The harmonic and satisfying sound, perfectly matched to the engines operation, gives the impression of a V12 engine from inside the cabin. The specially developed control kit converts The Akrapovic exhaust system from a mechanical system to a mechatronic one. The gas flow from each link pipe is driven into the muffler without unpleasant streaming or whistling, with peaks at specific frequencies dampened for cruising comfort, and the sportier and emphasized sound is fully embraced when driving more dynamically. The sound experience of the Evolution Line system is directly linked to the cars drive with no compromise to comfort or sportiness. This product is ECE type approved, with plug and play installation and no need to remap the ECU. An optional Akrapovic Sound Kit is available, which will increase the aural pleasure of The Akrapovic Evolution Line exhaust at lower revs and further supplement the sound as the revs rise. For mounting Akrapovic exhaust S-PO/T/2 or S-PO/T/3H on Porsche Cayenne V6 models w/o Porsche sport exhaust, additional wiring kit P-HF1621 is required. With the use of the optional Akrapovic Sound Kit, the ECE type approval of the Evolution Line is no longer valid. The Evolution Line exhaust system is ECE type approved for cars equipped with Otto/gasoline particulate filters.