|
I've also installed the m performance exhaust on my 2013 535xi and noticed it drones in comfort mode around 1500-2000 rpm. Especially going up hill. As for the 2 different part numbers from the exhaust I read on other forms they slightly changed the muffler pipes to accommodate the new 80 mm chrome and carbon fiber tips. I have the 362 part number and noticed drone too. I might take the exhaust off and take them to the dealer and have them install it. Then after a weeks says it drones and they might fix it by doing some sort of software or tune to the ecu to eliminate the drone or order new exhaust.
|