The PSP version is notorious for its difficulty spike in the final third. Opponent AI rubber-bands aggressively. With an save file, you level the playing field. You maintain the challenge of racing lines, but you remove the tedium of repeating the same event 15 times just to afford a new transmission.
Getting the most out of The Fast and the Furious on PSP often requires high-quality save data to bypass the grind and unlock the game's full potential, especially given regional limitations in some versions. The "Extra Quality" Advantage fast and furious psp save data extra quality