With all the DPF issues I was reading about earlier this year, I decided to install a DPF-R kit in my truck with about 15K on it. When I pulled the DPF I had no problems with clogging up, but I wanted to make sure I did not get into a crazy situation. Anyway I have the OEM DPF sitting on my shelf waiting for emission test in a couple of years. Here in WA it is required.