Quote:
Originally Posted by Kr0m3assass1n
Anybody notice just one exhaust tip covered in black soot while the other tip is shiny? This is for a 2015 35i.
I also noticed on cold days that the same exhaust pipe is the only one billowing fumes. It's like only half my exhaust is working? :
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The second exhaust won't open until the certain RPM is reached. I forgot what RPM, though. 3k+ or 4k+ RPM?
I don't recall that the cold start would have the second exhaust opened.
Anyway, my '15 35i produced the very deep and nice sound in the cold start, probably 5-15 seconds, but I didn't pay attention if the second exhaust was opened at the time. Or, the sound was due to the flap opening in the first exhaust.