Akrapovic Exhaust System for BMW M2 Competition (F87N)S BM T 3H SO Slip On The system was developed on BMW M2 Competition (F87N) equipped with OPF GPF, however it fits both versions (OPF and non OPF). ECE type approval is only valid for cars equipped with OPF GPF. The latest addition to the BMW M series is the awe inspiring M2 Competition, an exquisite high performance car that can be made even better by adding an Akrapovic Slip On exhaust system. Made from titanium with some parts cast in Akrapovics own