I have the Dinan Free-Flow that I bought from a fellow poster here in the private "For Sale" section. It was a month old and the previous owner decided to go cat-back and sold me the Dinan for half price. I really like the sound and look of it. Another alternative is the 335is exhaust, which is available for a lot less than the BMW PE, particularly if you purchase it from Tischer BMW (
www.getbmwparts.com).