This is a Status Gruppe Section 2 X-Pipe Unresonated. After trying many header, section 1, section 2 and section 3 combinations on the E46 M3, this section 2 is the best I have had. This pipe was $517.71 after shipping and tax (when it is in stock). The only reason I am selling this Status Gruppe is because, unfortunately, I am selling my E46 M3. I am an hour south of Minneapolis, MN. This section 2 has never seen salt--the car was always parked in winter. I can ship at buyers expense.