I've also had the Blitz Nur Spec cat back for about 3 years now. Got it from Horsepowerfreaks. Really nice system. My first choice would have been the RSR GT2 Ex mag due to its super straight through design and awesome angle the muffler sits at, but it was already discontinued. Even though the Blitz was really designed for Cali cars, I really didn't have any fitment problems. At first I had it bolted up to the stock DP & cat and it sounded good, but a bit muffled. about a year ago I (finally) I added the HKS DP and a 3" test pipe and boy does it sound better. It's a bit boomy inside with the windows up, but I don't care. The 7M's great deep growl really comes through. I swear it's louder inside the car. I got pulled over for it once, but a paddy wagon was right behind me leaving a light and it was a quiet side road at night so they must have been bored until I came along.