Evolution Link Pipe Set (Titanium) was tested and developed together with Slip-On Line (Titanium).The Evolution delivers more power, improves responsiveness, and keeps weight down. The uniquely designed muffler from the Slip-On with an added lightweight and exhaust flow–optimized link pipe set with bigger tubes fully represents the titanium Evolution. This performance exhaust has been created to produce a deep sound that transforms the Turbo into a real machine. This is especially the case after removing the point-welded block in the link pipe that prevents bypassing the muffler. The dual-mode system can be also used with the factory button to regulate the exhaust valves. Complete the look with a set of exquisite tailpipes in carbon fibre.If the car is equipped with performance exhaust with electronic valve actuators than actuator set P-HF1006 is required and the Akrapovic sound kit P-HF1003 can not be used.If the car is not equipped with performance exhaust and you want to use the Akrapovic sound kit than Akrapovic sound kit P-HF1003 together with Actuator set P-HF1006 has to be ordered.Evolution Link Pipe Set only fits in combination with Akrapovi? exhaust system. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.