Akrapovic Downpipes (SS) for 1-Series M Coupé (E82)Akrapovic Stainless Steel Downpipes for BMW 1 Series M Coupe (E82) For the ultimate in weight reduction, tuning potential, and racing sound, we offer stainless steel, catless down pipes. When used in conjunction with the Evolution performance exhaust, this is virtually the same setup used on the 1M MotoGP Safety Car. The high flow down pipes do require ECU reprogramming to eliminate the check engine light and for peak power output. They are only for