This is a BMW 320d GT (GranTurismo) xDrive 2015.
I bought this car in August 2022 and since then we have been making small changes to it. Not in the outside tho!
The last owner did a stage 1 or 2 tuning to this car but i’m not sure which one is it because i haven’t taken this car to the dynamometer.
We have soundproofed all of the doors and added better sound system.
We tore the door apart and added some soundproof panel to the inside plastic part and on to the actual door by taking the gray padding (right photo) off so the soundproof panel would be inside the door frame.
At the same time we changed the back door speakers because the original ones needed an update.
This was really easy to do and it has made a huge difference on cancelling the noises while driving and now you can hear the music better. The soundproofing panel is also really affordable!
Later we will add more soundproof panel near the wheels so the tire noises will be ever quieter.