i did and i loved it... not i have it on my 2.5 its probably one of, if not THE loudest catback you can find
There are several members currently running around with the Nur Spec. I had it on my car for a couple of months, but was too loud for my tastes. Putting the silencer in KILLED the cars low end, so I traded it to another member for something more my tastes. It did sound great though! Low and mean...
If you are looking for obnoxiously loud, the Nur Spec is the way to go. There are exhausts out there that have just as much performance, with the boxer sound, but without the droning.
FYI...Moved and merged this thread. Try not to cross post, it makes keeping track of your info harder...I also moved it to the power and performance section to get a better response...