Constructed from lightweight high-grade titanium – with complex parts made in Akrapovi?’s in-house foundry – the Slip-On Line provides over 45 % weight saving over the stock system. It is fully ECE compliant. The system is tuned to provide a perfect sound accompaniment inside as well as outside the car's cabin and is perfectly finished with hand-crafted carbon-fibre tailpipes to offer a beautiful visual appeal. To set off the system to its visual best, optional carbon-fibre diffusers and mirror caps are also available.The optional Akrapovi? Sound Kit (P-HF1194) is also available. If upgrading the slip-on system with evolution link pipe, the optional Akrapovi? Sound Kit P-HF1194 is not needed - specially developed Akrapovi? Sound Kit is already included within the evolution link pipe set. With the use of optional Akrapovi? Sound Kit, the ECE homologation is not valid anymore.For installing the slip-on system, the stock exhaust system has to be cut. Please read the instructions carefully before the start of the installation.