Up for sale is a lightly used AA Signature Exhaust for the N52 engine. Will fit all N52 engine sedan/wagon cars, 325/328/330 including xi version.
Asking $450 shipped anywhere in the continental USA.
I installed this on my 330i and it is too loud for my taste so I switched over to the BMW PE. It was installed on my car for about a month and probably has about 1500 miles on it.
It will need to be welded to your exhaust since I had it welded to mine.
Pictures: