Here is a quick video of my 545i that has a straight pipe from the cats back. No resonators, no mufflers.

Let me know what you think!

 

Straight piped sounds amazing man. A buddy of mine who got a M5 recently bought it as straight pipes. I drove the thing and it sounds sooo insane, sounds like I'm driving a lambo or something, so angry sounding. The v8 sounds amazing with that setup.

 

Thanks man! Im thinking of calming it down a little bit and putting magnaflow resonators on it. Its gets kinda raspy in the higher rpms.

 

Yeah honestly the noise gets old after a while. On my Dinan M3 the exhaust sounded bananas, but when I was just cruising I had horrible drone in the cabin. I eventually had to add additional resonators. It was especially bad in the heat the exhaust was much louder.