This is a good example what an E53 3.0D with DPF sounds like with straight through mufflers.
Not V8,of course,but still sounds nice .
Also please note that it doesnt smoke ,even on full throttle....
YouTube - BMW X5 Diesel Sportauspuff Exhaust Extrem Sound
http://www.youtube.com/watch?v=LB7E9...eature=related