I have been in a 325 with a remus... REMUS has got to be the best I could feel way more power throughout the powerband!damn nice. I have also been in a couple 325 with Triflo it felt more like the M3 exaust. good luck but i think remus is he way to go....if i get another it will be a remus Okay here's the deal. Everyone knows that tri flow is probably the best exhaust system for BMW's. But is it worth the money? What other exhaust systems does everyone think are the best for your money. Supersprint? Remus? Dinan? Hamann? Any feedback on what any of these sound like is apreciated.