Yesterday I removed my stock mid pipe and replaced it with an OR Pro Chamber. Combined with the M58 catback, I love the sound. Not obnoxiously loud, but is definitely louder than stock; good and throaty. Just what I was looking for. One thing I ran in to was when I was re-attaching the front drivers-side 02 sensor, it was too short. The two ends reached but I was only able to get the sensor about half way in. The female end of the sensor (the one not coming from the downpipe) was mounted on a white piece of plastic which, in turn, was mounted to either the bell housing or something else under the car. Either way, I was able to pry the sensor end and the white mounting clip free from what it was mounted to and it gave me the length I needed to get the two ends attached. There is a little bit of slack so I'm not worried about any damage to the chords, I was just surprised it was something I ran into since I had never read anything about it before. Has anyone else run into the same issue?