Video was made with an older version of LMU where the top speed of hypercars was higher and hence the achieved faster laptime in this video: https://youtu.be/PwXzffIIe0Q
Linked video is from a VR run without HUD with low fuel, but the setup is easily used on longer stints as it's quite relaxed on tire use.
Managed a 3.26.6 in a qualy session on medium grip in the latest version of the game, but sadly do not have a video for it.