What broke on the engine?

Well after getting the engine out of the car.  The next day I pulled the head off and found out exactly what the problem was.  Our guess of a broken valve was correct.  One of the exhaust valves in cylinder 3 has a nice chunk missing from it.

There is quite a lot of carbon build up in all 4 cylinders, which is no surprise if you have ever seen my car run at an Autocross event.  The engine burned quite a lot of oil. 

Judging by how the cylinders and pistons look.  The rings are leaking a bit, but not severely.  I would bet that if I threw a new valve in the head and cleaned it up it would run fine. though it wouldn't solve the oil burning issue. 

As you can see from the above picture there is a lot of carbon on the pistons as well.  Amazingly the piece of the valve doesn't seem to have caused any real damage. I haven't located any scratches at this point from it.

Hoping to have the new engine very soon!