New exhaust and what mods?
 

Any one that has a straight piped E60/E61 please tell me how it sounds. Right now I have catless downpipes and a muffler delete and I'm wondering how a full straight pipe would sound. My biggest issue is with back pressure and how it would effect things since I don't know much about it, so please lmk anything before I spend my money
Also, please give me more mods to do because my car is slow affffffff :lol:
https://cimg4.ibsrv.net/gimg/5series...30d4a0dd22.jpg

Generally, with turbos, back pressure is not a concern. With normally aspirated engines, yes, back pressure is a concern.

How about you post a clip of how your sounds now? I'm debating muff delete on mine. (And even without DP and just JB4, mine isn't slow AF.)