BMW F87 M2 Milltek Exhaust System, cat back high grade stainless steel exhaust system. As well as the great sound from a Milltek BMW M2 exhaust system, you have to love the look, style and the fitting. That’s right the fitting! Too many after market exhaust systems just don’t fit right. Its not the cars with the Milltek BMW M2 Exhaust System, they fit just like the factory exhaust system, no welder, not 4ft pry bar, no lump hammer required.