Need for Speed Payback

This is definitely easier on Whipsnake Loop on the west of the map. It's a longer route and my speedwall shows top scores of 600K+, whereas the scores on Drift King top out around 460K.

The first thing you're going to need is the BMW M5, which you unlock in Chapter 4. This car will set you back 125,540 at the Drift dealer, but you're going to be needing it anyway for another achievement. During this chapter, you'll also unlock "The Drift King" in the Northeast part of the map. This is really the best option as there are a lot of turns to give you additional score. You can do this with the stock M5, but throwing additional upgrade cards at it won't hurt.

If you've gotten to this part of the game, you've already gotten drifting down well enough. If you haven't, the most important thing is to not hit any walls either during or after your drift. Hitting a wall completely resets your multiplier down to 1, so avoid them even if you have to cut a drift short. This doesn't apply to hitting cars.

The other important thing is to manage your boost. Save as much as you can for straight paths going between curves. When you boost, you 'lock' your multiplier so it can't decrease, which lets you save a x3 multiplier from one curve to the next.

With those two tips, you should see 350k easy. I was able to get over 500k on my first run of the trial. Avoid the walls, and you're solid.

Dont forget to go to live tuning and change the drift angle to more.

The BMW M5 can be bought after chapter 4 and by completing this chapter you also unlock the drift trial "The Drift King" that is your best choice for the 350,000 drift points.

I achieved this on one of the comments above, I found another place by doing autolog objectives.
Bottom right of the map you will find the event “RYFT DRIFT.”
I got over 700K on this & I even messed up a few corners.
Hope you find this useful.

First step:
Buy the BMW M5 2017 at the Drift Dealership for $125,540. Doing so also gives you 33% of the requirements for another achievement:


Second step (optional but recommended):
Upgrade the car using speed cards at a tune-up shop. This was my setup, but this is also my main drift car, which is why I have it tuned up this much.


Third step:
Like another solution mentioned, use the event "The Drift King" (unlocked in Chapter 4) at the northeast corner of the map. The key to drifting is to not hit walls. Your multiplier will do all the work for you, and as long as you manage to not hit that many walls, you should easily surpass 350,000 points. My first try at this, I was able to hit 889,000 and hit 350,000 with over 2 miles left on the track.

Obtain a score of 350K points during a drift trail event with the 2017 BMW M5 without hitting a wall. This doesn't reset your multiplier by hitting cars. I found this easy on the drift king.

I am by no means a drift-king at all, but found that the drift trial 'Drifting The Block' was the easiest and fastest to do. Even if you fail, it only takes like 1m:40s to finish this trial and you are right back where you started so no travel time required at all. Great spot for grinding SpeedCards / $$s / REP if you need any. Below my run with BMW M5 2017 (not stock version but upgraded). I hit just over the required achievement score, but that's enough :-)