Use Tap DS on the first sharp right corner down the hill.

In junkyard use DS for the sharp right corner. During the drift it helps to press once or twice the digital button again to stabalize the car.

When road splits you can take both routes, even though left side is a bit faster, but also more difficult.

Use same line through tunnel like on Forward.

You can either wallbounce or use Tap DS into junkyard, while the latter is faster (you can also use a combination of both).

Next left corner upwards use Tap DS.