As everyone knows by now, NASCAR has lowered the boom on both Penske Racing teams, sending a clear message to everyone in the garage area that the procedures enacted by NASCAR are not to be trifled with. This is a classic example of what happens if you want to do something to your race car or put something on it without NASCAR's blessing.
From what I have read and in my understanding in reading the penalty, the part that got them busted was not submitted for approval. That's one thing they did wrong. The rear-end housing was confiscated by NASCAR when both cars failed a pre-race inspection.
If you remember back when the Car of Tomorrow came out, two Hendrick cars were penalized at Sonoma for working in an area that the teams claimed was a gray area. NASCAR quickly made it clear to them then and to the Penske camps now, there is no more gray area in racing. It is only black and white.
So I think that's the reason for the severity of the penalty on the No. 2 team of Brad Keselowski...