Akrapovic BMW M2 Competition OPF/GPF Evolution Titanium Link Pipe Set (F87)The Akrapovic evolution link pipe set for the BMW F87 M2 Competition combines with the slip on OPF back system to create a full Akrapovic cat back exhaust. It's crafted entirely from titanium. The whole system is designed to provide the smoothest flow. The power and torque gains of the M2 Competition with the combination of the Slip On Line system and Evolution link pipe set are guaranteed. In depth engineering has produced a unique sound profile,