[Fuel]

I want to get a more "aggressive" sounding exhaust for my 535i, anyone have any ideas or advise?

I don't know what it has but here is a picture; if it helps at all.

 

[Fuel]

The exhaust looks stock to me and I don't know of any bolt on performance systems for the E28. If I were you I would go to a muffler shop and have them build something for you.

Open headers then?

I know it has 2 mufflers on it and a cat that was put on in the early 2000's; but I have to go through emissions and it doesn't exactly pass as is, but if I can register it as a classic I can cut the cat off and do what ever I want.

Nice E28! :bimmer

Why thank you haha, but that doesn't help lol.