That car has been for sale for quite a while, I know because when I was looking for E39's was a while ago and it kept popping up.
that E39 is riced out all kinds of stickers and badging everywhere, a stick on spoiler, cluster, CF hood with ugly ass hood locks. Custom sounds system but really it's a Best Buy special.
And no way in hell does it go from 280hp to 360 hp from a few breather mods. 80 HP gain on an N/A BMW motor is a lot. Maybe it's because of the red valve covers?