The DA Twin has Kellener Sport Exhausts on it - they are very loud. In fact my neighbors have commented on how loud they are and how they know when I leave for work at 6am in the morning. This car has no resonators and has X-pipe and cats.
So I am looking to trade someone who wants that aggressive Kelleners sound for something like a SuperSprint exhaust. I would like a comparable system (not stock) - I am not looking to put the resonators back in, so it would have to be something that sounds good, but has less bite and is quieter than the Kelleners.
My ideal situation would be to find someone local and go to a shop and just swap out muffler sets at the same time. I would be flexible though.
For people who want to hear them, this is pretty representative:
YouTube - E39 M5 with Kelleners Sport race exhaust (Eisenmann) 4x76mm tips
YouTube - E39 M5 Accelerating
So, yes, they sound like sex, but I do not want to be the neighbor known for the screaming girlfriend at 6am and getting the stinkeye from all who walk their dogs past my lawn.