Bought an e46 from an old lady

Hello everyone, my dad bought an e46 off Craigslist from an original owner that was a professional 80+ year old. It has 53k miles on it and is a 6 speed manual. From the order sheet they had it looks like the ordered every option they could, but the car also has these Bavarian Autosport decals on each side. Any clue what this means? From what I’ve gathered they closed in 2019 and did tuning / performance parts but from the paperwork the car looks fully stock. Any ideas on what could be modified? I’ve included a quick video of the car and a picture of the decals in the comments.