Broken ringlands were a serious problem from late '07 models into 2011...some guys going through two motors in less than 30k miles. It doesn't seem to be as big a problem on the '12'-13.
The stock tune is garbage, and some people think its the cause of all the ringland failures. But Stage 1 and 2 cars have blown up too.
I have 15k on my '11 and I love the car. But it's always in the back of my head that my engine could be next.