the smoke and the smell is from the invidia as mentioned above and it will go away
in a week or so.i have been told that the smoke and smell comes from a maintenance oil that the invidia have when new.so no worries

 

just out of curiousity: if the Invidia drones so much, isn't it possible to add the Helmholtz resonator of the OEM exhaust (or a replacement resonator) to the Invidia to stop the drone? Takes some cutting and welding of course, but it doesn't seem impossible?

gr. Michel

 

Smells very much like extremely burnt/charred marshmallows, or something along those lines.