Originally Posted by ohsix
I just got the active autowerke axel back, it sounds amazing and it's $599+ shipping. Since you own a 325i it's going to need custom piping since it was originally built off of the 328i thinking the 325i was the same but it wasn't. My muffler shop made me a custom pipe from the resonator paid a total of $150 for install.
$600 for the AA, plus $150 for install and you're basically at PE money.