Yes. Not private, they were hard to find before because I think they were VIP mods (which is a dumb idea anyway) that were leaked. They seem to be showing up on mod sites now, the R8 and Q7 at least.
Excuse me but How is a human being supposed to be able to do this??? I played the crap out of this game as a little kid (which is a huge factor as to why I play BeamNG and a bunch of other racing games) but even now I can't beat most of these challenges without resetting at least 30 times... like it literally took me 40 minutes to beat a Head to Head because they unfairly bump up the performance of the AI when you pass them so it's impossible to get a lead on them. Despite the ludicrously unfair difficulty, Burnout 3 is one of those games that will never get old no matter what, alongside Rollercoaster Tycoon 3 and... some other game I can't think of at the moment :/
I can still do that. Not every time though. Take down your opponent at every opportunity. Sometimes in races I get 20+ seconds ahead.
Kinda difficult when there's cars coming at you at 160 MPH and every opportunity to bash them usually ends up with you smashing into a wall -_-