From the main menu, choose ‘Exhibition’ then ‘Banger Race’ and choose the first track, ‘The Sidewinder’ (so you can catch up if you are behind). I chose the muscle car “Frenchy” and made the race one lap and changed the opponents’ vehicles to Sedans. Also make sure the difficulty is on “Insane.”
You don’t have boost at the beginning (but the opponents’ vehicles do), but at the first turn you should get some by ramming other vehicles. That’s the trick, is to ram other vehicles to get boost to get into first place. Also, make sure you don’t get caught in a pile up or against the wall or anything. If you do, just restart the race. I got this on my second try using these settings. I played it three more times using these settings and won two of the races. There’s no foolproof way to get this one, so just keep trying.