Evolution Link Pipe Set (SS) was tested and developed together with Slip-On Line (Titanium).Constructed from high-grade stainless steel, this noticeably lighter-than-stock link pipe features a resonator in the middle part and removes the secondary set of catalytic converters. Available for all countries (United States excluded), the link pipe delivers a power gain of 13.4 kW (18.2 hp) at 5,850 rpm and torque increases of 21.9 Nm at 5,850 rpm when tested on the Akrapovič dyno against a BMW M2 (OPF/GPF) with a standard stock exhaust. Combined with a Slip-On Line (Titanium) delivering a deep, rich, and sporty sound without drone, it totally embraces the pure turbocharged inline six-cylinder sound. Remapping is mandatory as the stock secondary catalytic converters are removed. This product is meant for racetrack use and closed courses only.This product fits on OPF and non-OPF vehicles. The product also fits on M3 and M4 LCI versions.THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.