I have a 2012, I am having the P420 code. replaced the cat under the car. When i pulled it off. All of the Catalyist material came out of the cat. It just poured out looked like a pile of rubble replaced it from the dealer installed it myself. Now i am getting the same code again. I am assuming the upper is bad now. Do they even sell these bolt ins ready to go for Cali cars? [h=2][/h]