I personally haven't had any experience with the ANSA but if i'm not mistaken the muffler they sell for a 325e is not stainless, which transfers into having to buy one as often as the stocker, especially if you live where the weather gets bad and drive your car in the snow. Salt kills exhausts.my option was to get a stainless muffler from my local rice shop(no 5inch tip)and have a local shop bend a piece of stianless from the cat to the muffler and i put it all together myself. Full stainless catback for under $200.