Sound, design, and performance have combined to create this stunning exhaust. The Akrapovi? sound engineers have produced a rich, harmonic, high-frequency tone from the system in the upper rev range, which perfectly combines with the deep sound in the lower range to provide an aural experience in the cabin with no drone and a sound that lingers long after the throttle is released. Constructed from lightweight high-grade titanium, with parts made in the in-house foundry to create a perfect fit within the limited space available, the three mufflers ¨C two side and one central ¨C are configured in a unique way, perfectly engineered by the Akrapovi? technicians. There is a choice between two different sets of round titanium tailpipes, sandblasted and coated, and available in a natural titanium finish or black. The inner side of the tailpipes features a dynamic relief surface for increased aesthetic value. An engraved logotype adds to the visual presence. Power gains of +4.8 kW at 3,000 rpm and a torque increase of +15.8 Nm at 2,900 rpm were recorded on the Akrapovi? dyno, using a Porsche 718 Cayman GT4 with a stock exhaust system for comparison. This gives the system ¨C which is designed for racing track use only, and is not intended for street use ¨C performance to match its looks and innovative design. Optional extras are available: there is a Link pipe set in titanium for the Slip-On Line Race (Titanium) upgrade, and a carbon-fibre diffuser, in matte or high gloss, can be added to emphasise the design of the Akrapovi? exhaust tailpipes. For more control over the exhaust system¡¯s sound, the optional Akrapovi? Sound Kit is available to control the exhaust valves at any time and allow the driver to choose the setting preferred. This system fits also on vehicles equipped with Otto particulate filter (OPF). Fitment notice: A modification of fitting brackets done by Porsche on 718 GT4/Spyder produced approximately after February 2020 was identified. Please select your car build date to choose the appropriate exhaust for your car. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE. TECHNICAL DATA UNIT STOCK Akrapovic? MAX GAIN maximum power kW 308.4 / 5500 rpm 311.1 / 7550 rpm + 4.8 / 3000 rpm HP (m) 419.3 / 5500 rpm 423.0 / 7550 rpm + 6.5 / 3000 rpm HP (i) 413.6 / 5500 rpm 417.2 / 7550 rpm + 6.4 / 3000 rpm maximum torque Nm 420.6 / 5500 rpm 423.9 / 5400 rpm + 15.8 / 2900 rpm lb-ft 310.2 / 5500 rpm 312.7 / 5400 rpm + 11.7 / 2900 rpm weight kg 15.1 8.6 - 6.5 lb 33.3 19.0 - 14.3 % - 43.0 noise dB 91 / 3800 rpm 98.5 / 3800 rpm 7.5 installation time min 210 measured with: Porsche 718 Cayman GT4 / Spyder - OPF/GPF 2020