Game & rendered video looks good. Rarely, FMV video or splash image is vert-. Both car views look proper FOV.
(PLP screenshot with bezel effect)
SoftTH (DX9 x86). Run (path-to-game)\BurnoutConfigTool.exe (or use in-game's awkward menu). Select massive resolution, Aspect auto, max game & leave the rest. Play game.
HUD On Center (optional, not recommended): in PLP, game looks best default HUD (uncluttered view). But a tight HUD is available in-game menu: Esc, F1 x3 (to Video Options), Display, Multiple Monitors. Entry for Monitors: Triple. HUD Position: Car. Changes take effect at player view.
(1P view, at speed)
(crash cam)
(comparison: PLP)
(comparison: 1080p)
View guide for general help with the instructions.