I've searched the forums and, whilst there's useful information regarding DPF regeneration and where to obtain aftermarket replacement DPFs, I'm wondering if anyone has any experience of actually replacing one.   The exhaust on my 2011 estate, approximately 122k miles on the clock, started blowing and, thinking it was most likely the back box or middle pipe, took it into the local ATS yesterday to see about getting either or both replaced. Turned out it was a fairly major split in the