Is Gekitou! Crush Gear Turbo hentai?
No
Rated G (All Ages) on MyAnimeList and not tagged as Hentai.

TV · 2001 · 68 episodes · G - All Ages
Sports
After losing almost all their members the Tobita Crush Gear club is facing extinction. Kouya who dreams of being a Crush Gear Fighting Champion doesn't want to see the club become extinct and will do whatever he can to keep the club running and become a Cush Gear Champion.
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