Disclaimer: IRL the sound is night and day. Inside the cab you can really feel the exhaust as it creates a nice low resonance throughout the cab. I can feel the HP and torque increase best at the top of the power band in 3rd gear (6K). This is where DINAN states the peak output occurs so I am very pleased with the results. Additionally, I got a pretty sweet deal from my DINAN guy because he had a quota to hit so he cut me a great deal.
PS - I ran the car around for 30 minutes before both shots in the event some of you are wondering if this was a cold start.
My stock 335i exhaust before the DINAN install:
And with the DINAN exhaust installed: