Milltek Sport has release details of its hand-finished stainless steel exhaust system for the BMW M235i coupe. Based on the shared platform of the 135, Milltek’s R&D team was able to cross-over much of the development work it had done on the M135i model. The new system uses the existing EC approved cat back system from the M135i, but with the added optional feature of a new race-spec Sports Catalyst that features Milltek’s latest valve technology, utilising OE spec BMW electronic valves in its construction.