best car chase ever?

Within the franchise or beyond the Bourne films?

Within the franchise, the best ones were Paris from The Bourne Identity. Goa, and Moscow from Supremacy. The New York chase was a rehash of Moscow.

Outside the Bourne films? You'll have a long and varied list depending on who you ask. However, the stand out performances are
the original Gone in Sixty Seconds
the Gone in Sixty Seconds 2000 remake
Bullitt
the street race scramble from The Fast and the Furious
the garage scramble from 2 Fast 2 Furious
the final chase from Fast and Furious
the vault chase from Fast Five
Vanishing Point
Drive
Ronin
The Italian Job (Original and remake)
Bad Boys, and Bad Boys 2
Mad Max
Cannonball
The Cannonball Run
Cannonball Run II
Death Race 2000

Fantastic stunt scenes in an otherwise bad movie. My jaw dropped when the car slammed into the top of the van and they both hit the marquee at the front of the casino.

It's a shame that a great set-piece like that was in such a muddled film.

Two by William Friedkin: The French Connection. To Live and Die in LA.
And the one by which all others are judged: Bullitt.

It's been a while since I've seen such a great car chase, that's for sure.

The Force Awakens - The Last Jedi - From His Nap