I have just finished my turbo kit install and went for a ride now I see oil on the bottom of exhaust side, it is not too bad but enough to check oil on the daily. Please give me some ideas on what might have caused this issue.

It is a t3 t4 with a number 6 return line, my mechanic said this would be sufficient for my turbo.

The only thing I can think that it might be is the return line is too small if this is the case and it got backed up will I need to rebuild?