Originally Posted by Datsik 335
I think this is like a break in period for the exhaust. It should also smell weird. As long as it isn't blue you should be fine though, blue would mean there is a problem with your turbos. If I'm right it should stop in like 5-7 days.
Blue is the engine is burning oil. White is burning coolant. Both are (could be) a problem, however keep in mind the "new" exhaust (since it's used) could simply have trapped moisture in it that is now being evaporated.