Akrapovic Evolution Link Pipe Set (SS) - BMW 2 Series G87 M2Evolution 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