Man people in here are rather stupid...
I think his only problem is the fact he took off the catalytic converters, which are required by law in all states. Putting on a larger diameter exhaust is not going to hurt the turbo, its going to help it work easier. For any of you to say "You put an intake on your car, its your fault the turbo seals blew" shows your complete ignorance to how an engine works.
As others have stated, the ONLY reason those who have deleted cats or added race pipes noticed their car smoking is because they made it easier to notice the problem itself. Stock MS3s and MS6's are having the same turbo seal problems. Its not from modifying the cars exhaust system, or an intake. Its because of a bad turbo seal design. Nothing more and nothing less. At the most modifying it only makes the current EXISTING problem worse. it is not the CAUSE of the problem.
Some of these shops have complete idiots working there... I had my car towed to brookdale mazda here in mn because my traction control light stayed on, and the car was bogging when I gave it gas. First off they claimed there was no CEL, and the problem resolved itself. Got the car back and all my radio presets were gone. It was obvious they disconnected the battery to erase the CEL code.
While speaking to the tech he stated "We test drove the vehicle and the tech says it sounds like you have a boost leak, we noticed your cold air intake and think that may be your problem." Oh yes, an intake that only sees vacuum, never boost... is going to cause a boost leak
Seriously how dumb to these shops think us consumers are?