Is Initial D: Project D to the Next Stage - Project D e Mukete hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Special · 2003 · 1 episodes · PG-13 - Teens 13 or older
Action, Drama, Racing, Seinen
A special that comes with the Fourth Stage DVD-BOX. It is comprised of a recap from First Stage to Third Stage, along with staff commentary and sneak preview of the making of the Fourth Stage.
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