[Chapochipiti]

I have a 2018 M240 and i just installed my catless downpipe. When shifting into a higher gear it shoots a little smoke from my exhaust that smells like burnt rubber. Does not smoke when idle revving or when accelerating and then letting off without shifiting. Does not smoke when downshifting either. Smoke is mostly thin white with a hint of blue. The higher the rpm when i shift the more smoke there is and it does it 80% of the time. The smell of burnt rubber is from my freinds account as he was driving behind me.