Akrapovic Evolution Link Pipe Set (Titanium) - BMW F87N M2 CompetitionOP Optional partEvolution Link Pipe Set (Titanium) was tested and developed together with Slip On Line (Titanium). The system was developed on BMW M2 Competition (F87N) equipped with OPF GPF, however it fits both versions (OPF and non OPF). The Evolution link pipe set upgrades the Slip On system to the Evolution system, which consists of a slip on rear muffler and larger Evolution link pipe tubes with a middle muffler, all designed to make the