So i want to start off by saying i take pride in my own car.i keep it very clean and perform maint twice a year.I normally do all my own work on my car E90 335i.Its so clean as when i brought my car to get the ACF top mount Single turbo installed,it was on the lift and they couldn't believe how spotless the underneath and engine was.No oil leaks anywhere from a 2008 with 48,000 plus miles(Original Owner).Now i know i could of done the single turbo install myself but i would have done it on the ground,no lift and would of been a pain in the arse so i shopped around for a installer.Went with a company that had a lot of experience(supposedly) on single Turbo installs.After talking with the owner i felt comfortable to have them do the work.install was done last july.I did notice some oil residue on the return then.Since then till now only drove it about 2000 miles.So since it was nice weather today i decided to see whats going on.Well i found from looking with a mirror a bolt missing for turbo and what looks like oil leaking from threads on return.Also notice they used tephlon tape on flare part.Also rubbing on dump tube.When i see this this pisses me off.these are the reasons why i do it myself because i know its done right then.Also the ceramic coating is peeling(waste of money spent their).Also found the downpipe ceramic coating peeling bad,that i will just use the DEI Titanium wrap over the ceramic coating.Question is do i bring car back to have shop repair these issues or do i dont say anything and do it myself.