Evolution Link Pipe Set (Titanium) was tested and developed together with Slip-On Line (Titanium).This full titanium accessory features complex parts cast in Akrapovic's in-house foundry and is constructed from lightweight high-grade alloys to reduce weight. Combining the Evolution Link pipe set (Titanium) with the Slip-On Line (Titanium) exhaust creates a system that is perfectly in tune to deliver the very best aural experience in all driving modes. Akrapovic's sound engineers have worked hard to produce a sporty V8 sound with an unmistakable Akrapovic character, while keeping it smooth and eliminating any drone, all designed for maximum everyday comfort. The sound is closer to that of a muscle car and delivers an exhilarating soundtrack. With a cast collector on the link pipe, where the gases from both sides of the engine mix, the link pipe provides a smooth flow for the gas and aids in providing the perfect sound as an ideal upgrade for the Slip-On Line (Titanium). Akrapovic has achieved power gains of 17.7 hp at 4,550 rpm and torque increases of 27.3 Nm at 4,550 rpm when tested on The Akrapovic dyno against a BMW X5M with a stock M Sport exhaust system for comparison. With the installation of the Evolution Link pipe set, ECE type approval for the Slip-On Line (Titanium) exhaust system is not valid, and remapping the ECU is mandatory when it is fitted.THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.