Evolution exhaust systems for the BMW 340i are the result of the perfect integration of expertise, the best technology, and the use of the finest materials. Made of austenitic stainless steel, these systems feature a  layout with two central mandatory link pipes replacing the single stock pipe. The system is finished with carbon fibre tailpipes. This sporty elegance makes this Bavarian machine stand out from the rest and offers the taste of a more powerful version, accentuated with the additional power gains and weight losses of the Evolution performance exhaust system. The dual-mode ECU-controlled valve exhaust from Akrapovič offers stock-level sound at normal cruising, and a joyful deep sporty note when driving the 340i more dynamically. The Evolution systems replace the stock exhaust from the catalytic converters back.Please be aware that both part numbers: MTP-BM/SS/2H and E-BM/SS/2 have to be ordered! The system is splitted in 2 codes only because of packaging issues.Fittment notice:This system does not fit on vehicles equipped with Otto particulate filter (OPF).