SLF400

The SLF400 is a car that was cut from Midnight Club II. It is only referenced in the model and texture files and as such, does not appear in the finished game. It can only be recovered by using mods such as MODern Edition or Decade Edition. It is similar in appearance to the Pagani Zonda.

One possibility is that Rockstar Games did not have enough time to add this car to the final game.

Reference

 * assets_p.dat/texture_x/slf400

Trivia

 * There are a few videos showcasing the SLF400, made playable by modding, including this one.
 * This car could be a slower version of, or a predecessor to the SLF450X.