Any Dealership should be able to purchase and install any bmw apart available. They have to look up the OEM numbers and contact the manufacturer in Germany to order and ship im pretty sure. Thats what they did at mine.I am from the UK (London) and i have ordered my 428i,, I want to get the M performance exhaust system. The dealer didn't where i could get if from :-/ . Does anybody know where i can purchase it from?