[Sunred]

And let's not forget, they were Super Sentai's first teenagers with attitude.
Fun fact, Junichiro Katagiri who played Shunsuke/Yellow Turbo went on to appear as a police detective and subordinate of Detective Komori played by Mr. Green Two himself, Takahiko Ohta from Bioman, in Janperson. Katagiri also appeared in multiple Metal Hero shows throughout his career in guest roles and uncredited roles as well. The man was apparently even in Gavan back when he was considered a child actor, and seeing how his Japanese wikipedia page doesn't specify which role it was, I guess it's up there with Tokuyama's (aka Kickhopper, aka Go-on Gold) small role in B-Fighter Kabuto in terms of significance.
And one more bit of trivia, episode 9, which was a Shunsuke-centric episode, guest-starred Sayuri Uchida aka Ako/Blue Swallow from Jetman as the girl in their school who plays the flute.