Hey all... I would like to "upgrade" the sound of my 525i exhaust to a more "high-performance", "throatier" (is that even a word?? ) pitch, if you will...without turning it into a "tuner". I love my car to death but to be honest, the factory exhaust sounds a little....ummmm...weak. Questions abound: 1. Is this even possible on the E39? 2. If so what are the options? 3. Are we talking BMW parts, aftermarket, factory? 4. What kind of "clamolas" should I expect to shell out for this kind of work? 5a. Is it even worth it? 5b. Have any of you fellow E39-ers out there attempted this? If so, post-on - I'd be very interested in hearing about it. Thanks in advance!!