Look at my Set Boni at the End. Extreme Affix maxed out and you need to spend you Legend Points into the Extreme Perk in your Drivers Profile. When you fly and hold down Square (or whatever your Extreme Mode Button is) the Aircraft will behave like this!
Yes you use the Onramp on the Highway to jump towards the Donut. Starting from the Highway. But it's pretty hard to achieve. And you'll need a maxed out Nitrochemist Set for that.