{WTB} Cat-back exhaust system

I am looking for a cat-back exhaust system for a series I (2004). I currently have a cheap (junk) eBay cat-back, and the droning is too much for my 50 minute work commute. I am wanting either a stock or aftermarket cat-back, as long as the droning is reduced. Price will be dependent on condition and what brand it is.


I am located in Elkhorn, WI…..but I am close to Milwaukee, Madison, and Chicago. Let me know what you have available, and we can work out price.