I had my turbos replaces in December 2012 and after that I get the grinding popping noise coming from the passenger side when turning left! I get the noise under light throttle LEFT ONLY turns. I have been to 3 different Indy shops, re adjusted my downpipes I have even replaced my control/thrust arms and bushings with the M3 ones and the issue still exists!!!
Here is a similar thread that others have been having the same issue!
http://www.e90post.com/forums/showth...2#post14305722