The RB25 is a Nissan straight-six engine closely associated with the Skyline range, and its turbo flutter has become a recognisable signature in online car culture. Clips of the stututu sound circulate in drift videos, car meets, TikTok edits and racing game content, where creators use it as shorthand for a modified turbo setup. Because the flutter is so distinctive, it works even in short form, giving a video instant automotive credibility without needing a full engine recording, which helps explain why it keeps reappearing across car communities.