So, got my car back today after driving 7 series for a week. All good, no one said nothing about down pipe that i have... or mentioned about tune or anything like that.
They fixed map sensor - the reason i went to dealer in the first place, took almost a week to deliver.
Also they fixed something interesting.. well not exactly fix, they added a peace for the thing that moves pistons - his exact words, I'm assuming rod, they didn't replaced it just added something. it was factory defect or something like that.
Open the hood and all is greasy in oil... good job bmw, wasn't very happy about that
but apart form that all good