Does anyone know of an exhaust system that I could get for my 2004 D3 that is louder than the boring factory one? (not too expensive though) I dont need a really loud sound rather a good deep sound. A lot of my neighbors have 7 series and 6 series...when they pull off, their cars have a nice deep solid muscle like sound...mine sounds like a boring mom car.

 

the least expensive way to go and to keep everything close to factory as possible is S8 exhaust (used). I have it on mine and it sounds sweet. I also know a few guys who remove the resonator and ran straight pipe but then the car sounds like a muscle car (not my taste). If you want something that will maybe add some HP gains MTM or something like that

 

Wow..thanks man, will try the S8 suggestion